Backlight LED Flange Structure for Narrow Frame Display Uniformity
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Solution Overview
Problem
Side-edge type LED backlights in LCDs frequently experience bright spots or bright lines due to illumination dark areas caused by the light emitting angle and gaps between LED structures and light guide plates, which existing solutions either compromise luminous efficacy or require additional assembly parts and complex assembly.
Innovation Solution
A backlight LED structure with a flange structure on the LED bracket that covers the light guide plate and features angular areas with light guide points to shield and direct LED light, preventing emission from gaps and controlling light travel direction to eliminate dark areas and bright spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the length of the glue frame is increased to shield the bright spots or bright lines, then the shielding effect is improved, but the frame width increases which goes against narrow frame design
Solution Approach 1:
The invention divides the shielding function into two parts: the flange structure provides primary shielding by covering the upper side of the light guide plate, while the angular areas with light guide points provide secondary control by directing light into dark areas. This segmentation allows effective bright spot prevention without requiring an increased frame width.
Solution Approach 2:
Instead of solving the bright spot problem by extending the frame in the horizontal dimension (which increases width), the invention uses the vertical dimension by adding a flange structure that covers the upper side of the light guide plate. The angular areas then direct light at different angles into the dark areas, effectively solving the problem in a dimensional approach that maintains narrow frame design.
2Object-affected harmful factors
If reflective sheets are pasted at the two sides of the optical film for shielding, then the shielding effect is improved, but assembly parts increase and assembly becomes complex
Solution Approach 1:
The invention merges the shielding function and the light guiding function into a single integrated flange structure. The flange structure both shields the bright spots by covering the light guide plate and guides light into dark areas through its angular areas with light guide points. This integration eliminates the need for separate reflective sheets and reduces assembly complexity.
Solution Approach 2:
The flange structure serves multiple functions: it provides mechanical support for the LED bracket, shields bright spots by covering the light guide plate, and guides light into dark areas through its angular areas. This multi-functionality replaces what would otherwise require multiple separate components including reflective sheets, thereby simplifying the overall assembly.
3Stability of the object's composition
If the gap between the LED structure and the light guide plate is increased to achieve light mixing distance, then the uniformity is improved, but luminous efficacy is reduced
Solution Approach 1:
The angular areas with light guide points act as an intermediary mechanism between the LED structure and the light guide plate. Instead of relying on a large gap for light mixing, the light guide points directly guide light from the LED into the dark areas, achieving uniform light distribution while maintaining a small gap that preserves luminous efficacy.
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
Effectively prevents bright spots or bright lines at the display panel sides while maintaining luminous efficacy and supporting narrow frame designs without adding new assembly parts, ensuring improved display quality and assembly simplicity.
Implementation Method 1
the flange structure covers the upper side of a light guide plate when the backlight LED structure and the light guide plate are assembled, for shielding LED light from being emitted from a fitting gap
Implementation Method 2
scatter travel direction of light under the reflecting and scattering effect of the light guide points
Implementation Method 3
scatter travel direction of light under the reflecting and scattering effect of the light guide points
Data Source
AI summary
The present invention discloses a backlight LED structure, a backlight and a display device. In the backlight LED structure, a flange structure is arranged at the upper side of an LED bracket which is defined when the LED bracket is mounted close to a light guide plate such that the flange structure covers the upper side of the light guide plate when the LED structure and the light guide plate are assembled. In addition, each of the two ends of the flange structure has an angular area extending outwards, and the lower surfaces of the two angular areas are distributed with light guide points. The backlight LED structure can prevent the LED light from being emitted from the fitting gap between the backlight LED structure and the light guide plate, and control direction of light between the backlight LED structures and scatter travel direction of the light.