Backlight Unit Light Blocking Member Zigzag Adhesive
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Solution Overview
Problem
Conventional backlight units for display devices suffer from light leakage, which affects the uniformity and quality of the display, particularly in edge-illumination type backlight units used in mobile devices.
Innovation Solution
The proposed solution involves a backlight unit design that includes a light guide plate, a light source unit with a substrate, adhesive members, and a light blocking member. The light source unit is arranged along the substrate's length, with adhesive members placed between light sources in a zigzag pattern to reduce light scattering, and a light blocking member is used to prevent light leakage by being positioned between the light guide plate and the substrate, ensuring uniform light distribution to the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a light source is disposed at a side surface of the light guide plate in an edge-illumination type backlight unit, then the overall thickness is reduced, but light leakage occurs affecting uniformity and display quality
Solution Approach 1:
A light blocking member is introduced as an intermediary element between the light source and the light guide plate. This light blocking member specifically blocks light that would otherwise leak into non-display areas, thereby maintaining uniform light distribution without increasing the overall thickness of the backlight unit.
2Reliability
If adhesive members are placed between light sources in a zigzag pattern, then light scattering is reduced, but the structural complexity increases
Solution Approach 1:
Adhesive members are arranged in an asymmetric zigzag pattern rather than a symmetric linear arrangement. This asymmetric positioning optimizes the blocking of scattered light paths between adjacent light sources, reducing light leakage and improving uniformity while the pattern itself provides a systematic method for implementation.
3Reliability
If a light blocking member is positioned between the light guide plate and the substrate, then light leakage is prevented, but the device complexity increases
Solution Approach 1:
The light blocking member is positioned specifically at critical locations where light leakage occurs, rather than uniformly across the entire structure. This localized approach blocks harmful light paths while maintaining transparency and uniformity in display areas, thereby preventing light leakage without significantly increasing overall device complexity.
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 reduces light leakage and enhances the uniformity of light distribution to the display panel, thereby improving the display quality and reducing the risk of damage from external forces due to the optimized structural configuration.
Implementation Method 1
adhesive members placed between light sources in a zigzag pattern to reduce light scattering
Implementation Method 2
a light blocking member is used to prevent light leakage by being positioned between the light guide plate and the substrate
Implementation Method 3
a light guide plate which guides the light to the display panel
Implementation Method 4
a light guide plate which receives the light and guides the light to a display panel
Data Source
AI summary
A display device includes a backlight unit which includes a substrate defining a width thereof in a first direction and a length thereof in a second direction crossing the first direction; light sources mounted on the substrate and arranged in the second direction and spaced apart from each other, each light source generating light and emitting the light in the first direction; a first light blocking layer disposed spaced apart from the light sources in the first direction by a first distance and facing the light sources; and an adhesive member provided in plural arranged in the second direction and spaced apart from each other, the adhesive members disposed spaced apart from the first light blocking layer in a direction opposite to the first direction by a second distance smaller than the first distance, and alternately arranged with the light sources in a zigzag shape.