Backlight Module Optical Modulation Film Periphery Brightness
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Solution Overview
Problem
Traditional backlight modules often suffer from dark bands and non-uniform brightness levels at the periphery corners of display devices due to limited light distribution, which can be costly to address with increased reflective structures.
Innovation Solution
A backlight module design featuring an optical modulation film with varying perpendicular distances and curvature adjustments to distribute light more evenly, using a supporting plate with light sources and optical modulation film structures that enhance light exit holes for improved peripheral brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional reflective structures are installed at the four corners of backlight modules to increase brightness levels, then the brightness levels in corner areas are improved, but the manufacturing costs increase
Solution Approach 1:
The optical modulation film is designed with different perpendicular distances from the supporting surface at different locations: the central area has a first perpendicular distance while the periphery area has a second perpendicular distance that is greater than the first. This local variation in structure creates different light modulation effects in different regions, specifically enhancing light distribution to the periphery corners without requiring additional reflective structures throughout the entire module, thus improving corner brightness while controlling manufacturing costs.
2Illumination intensity
If the optical modulation film is positioned closer to the light source in the central area, then the light distribution in the central area is optimized, but the periphery areas receive limited light resulting in dark bands
Solution Approach 1:
The patent introduces a vertical dimension variation to the optical modulation film structure by creating different perpendicular distances from the supporting surface. The film transitions from a first perpendicular distance in the central area to a second perpendicular distance (greater than the first) in the periphery area. This three-dimensional structural change allows light to be modulated and redirected more effectively toward the periphery corners, solving the light reception limitation without compromising central area optimization.
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 increases brightness levels at the periphery areas, reducing dark spots and achieving more uniform light distribution, thereby enhancing display quality without significantly increasing manufacturing costs.
Implementation Method 1
The optical modulation film distributes light generated from the light source module to emit out of the light exiting holes at different positions
Implementation Method 2
Light emitted from the light source is adjusted in light distribution by the optical film material in the backlight module
Data Source
AI summary
A backlight module includes a supporting plate, a light source module, and an optical modulation film. The light source module includes a plurality of light sources disposed on a supporting surface of the supporting plate. The optical modulation film is disposed above the light source module and has a plurality of light emitting holes. Light from the light source module is distributed by the optical modulation film and emitted via light emitting holes at different positions. The optical modulation film has a periphery area and a central area. An average perpendicular distance between the periphery area and the supporting surface is different from an average perpendicular distance between the central area and the supporting surface.