Asymmetric Light Guide Plate Protrusions for Backlight Uniformity
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Solution Overview
Problem
Conventional backlight modules for liquid crystal display devices suffer from non-uniform light emission due to the design of fool-proof structures, which affects the optical performance and brightness uniformity.
Innovation Solution
The design incorporates a light guide plate with protrusion parts of varying lengths and distances between light sources, optimizing the placement to ensure uniform light distribution and intensity across the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fool-proof structures are designed in the frame and backlight module to fix optical films in correct order, then the assembly precision is improved, but the light emission uniformity deteriorates
Solution Approach 1:
The patent applies asymmetry by making the first protrusion part have a different length than the second protrusion part. Specifically, the first protrusion part extends further in the first direction than the second protrusion part extends in the second direction. This asymmetric design compensates for the light intensity differences caused by the fool-proof structures, achieving uniform light emission across the display panel while maintaining precise optical film assembly.
2Illumination intensity
If multiple optical films are disposed in the backlight module to increase light extraction ratio, then the brightness is improved, but the structural complexity increases
Solution Approach 1:
The patent merges the light guide plate structure with the fool-proof structures by integrating protrusion parts directly into the light guide plate. This combination eliminates the need for separate frame structures and reduces the number of discrete components, thereby simplifying the overall structure while maintaining both brightness enhancement and assembly precision functions.
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 enhances the uniformity of backlight emission by adjusting the distances between light sources and protrusion parts, resulting in improved brightness consistency across the display panel.
Implementation Method 1
The light guide plate is used for guiding light to the display panel
Implementation Method 2
multiple optical films are disposed in the backlight module, such that the light extraction ratio of light emitted from the light source to light emitted from the light emitting surface of the backlight module may be increased
Data Source
AI summary
The present disclosure provides a display device, including a light guide plate having a main body part including a first side and a second side opposite to each other and a light incident side connected to the first side and the second side and a first protrusion part and a second protrusion part disposed at the first side and the second side respectively, and a plurality of light sources. A length of the first protrusion part is greater than a length of the second protrusion part. The light sources are adjacent to the light incident side, and the distance between the light source closest to the first protrusion part and the first protrusion part is less than the distance between the light source closest to the second protrusion part and the second protrusion part in a first direction.