Light Shield Connection Film for Backlight Brightness Uniformity
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Solution Overview
Problem
Existing light emitting modules face challenges in increasing size due to brightness issues at boundaries of connected light emitting units, leading to uneven light characteristics and the generation of bright lines, making it difficult to fabricate large modules without these defects.
Innovation Solution
A light shield connection film is introduced at the boundaries of light emitting units, comprising a base member with a light shield pattern that diffuses light to minimize brightness differences, using a configuration of varying size, density, and material distribution to achieve uniform light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple light emitting units are connected to form larger light emitting modules, then the size of the lighting device is increased, but brightness differences occur at the boundaries of light emitting units causing uneven light characteristics
Solution Approach 1:
A light shield connection film is introduced as an intermediary component at the boundaries between light emitting units. This film includes a light shield pattern that blocks excessive light from adjacent units, preventing the formation of bright lines at boundaries while maintaining uniform overall light emission across the enlarged module.
Solution Approach 2:
The light shield connection film applies local light shielding only at the boundary regions between light emitting units, rather than uniformly across the entire module. The light shield pattern is strategically positioned to address brightness differences only where they occur at interfaces, leaving the central regions of each unit unaffected.
2Productivity
If the size of light emitting units is increased to fabricate larger lighting devices, then the productivity is improved, but the manufacturing precision deteriorates due to difficulty in achieving uniform light characteristics
Solution Approach 1:
The light shield connection film serves as a mediator that enables the connection of multiple light emitting units while maintaining manufacturing precision. It compensates for boundary effects that would otherwise require complex adjustments during assembly, allowing for efficient fabrication of large modules with uniform light characteristics.
3Area of stationary object
If light emitting units are connected in parallel to increase module size, then the area is increased, but harmful factors are generated in the form of bright lines at boundaries
Solution Approach 1:
The light shield connection film converts the harmful bright lines at boundaries into beneficial uniform light distribution. By strategically blocking light at boundary regions, it prevents the formation of unwanted bright lines while ensuring that the overall light emission remains uniform across the entire module area.
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 light shield connection film effectively reduces brightness differences at boundaries, enabling the fabrication of larger light emitting modules with uniform light distribution and enhanced structural stability without requiring equipment replacement or process changes.
Implementation Method 1
a light shield pattern 24 located on the base member 22... shielding a bright line that is generated at the boundary
Data Source
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AI summary
Provided is a backlight for a display device. The backlight (100) may be provided behind the display screen. The backlight may include a first light panel (11), a second light panel (12) provided adjacent the first light panel, and a diffuser (20) provided over a boundary between the first and second light panels to diffuse light between the first and second light panels. The diffuser may have light blocking regions arranged in a prescribed pattern (108) to diffuse the light.