Side-incidence Backlight Module Light Leakage Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Side-incidence backlight modules suffer from light leakage, resulting in decreased light efficiency due to some emitted light failing to enter the light guide plate.
Innovation Solution
A side-incidence backlight module is designed with a light leakage preventing member featuring grooves that accommodate light emitting elements, positioned between the light strip and the light guide plate, which redirects light to minimize leakage and enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a light strip is positioned at the side of the light guide plate, then the backlight module structure is simplified and ease of manufacture is improved, but light leakage occurs and light efficiency deteriorates
Solution Approach 1:
A light redirecting member is introduced as an intermediary component between the light strip and the light guide plate. This member redirects light that would otherwise leak from the side of the light guide plate, ensuring it enters the light guide plate effectively. The light redirecting member includes a light incident surface and a light emitting surface, acting as a mediator to transform the direction of light propagation and improve light utilization efficiency while maintaining the simplified side-incidence structure.
2Device complexity
If the light emitting surface faces the light incident surface directly, then the optical path is simplified, but light leakage occurs when light fails to enter the light guide plate
Solution Approach 1:
The light redirecting member is designed with a specific geometric structure that includes a light incident surface and a light emitting surface positioned at different spatial locations. By changing the dimensionality of light propagation through this intermediate structure, light that would normally leak sideways is redirected into the light guide plate. This adds a spatial dimension to light control without significantly increasing overall device complexity.
3Ease of manufacture
If no light redirecting structure is used, then the structure remains simple and manufacturing is easier, but light efficiency decreases due to light leakage
Solution Approach 1:
The light redirecting member changes the propagation direction parameter of light through its geometric structure. By altering the angle and direction at which light travels from the light strip to the light guide plate, the system improves light entry efficiency. This parameter change is achieved through the structural design of the light redirecting member rather than complex optical coatings or additional components, maintaining ease of manufacture while improving light 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 reduces light leakage by changing the propagation direction of light, thereby improving light efficiency and ensuring more light is utilized in the liquid crystal panel.
Implementation Method 1
the light emitted by the light source enters into the light guide plate and is reflected to irradiate a liquid crystal panel
Implementation Method 2
the light emitted by the light source enters into the light guide plate
Data Source
AI summary
A side-incidence backlight module including a light guide plate, a light strip and a light leakage preventing member. The light strip is disposed at a side of a light incident surface of the light guide plate and includes at least one light emitting element. The light leakage preventing member is located between the light strip and the light guide plate and extends along a width direction of the light guide plate. The light leakage preventing member includes at least one groove. An opening of the groove faces the light strip. The at least one light emitting element is at least partially accommodated in the groove.