Backlight Module Inclined Reflection Prisms Uniform Line Source
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Solution Overview
Problem
Conventional backlighting methods struggle to produce a soft, even, and uniform line source of light for ultra-thin electronic devices, often resulting in uneven brightness and visible bright spots due to the light source being positioned close to the light-emitting surface.
Innovation Solution
A backlight illuminating module featuring a light reflection housing with inclined reflection surfaces and prisms that reflect and diffract light to produce a uniform line source, comprising a supporting base with inner mounting surfaces and light reflection members with vertical optical surfaces, allowing for even illumination distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source is positioned far away from the light-emitting surface, then uniform brightness is achieved, but the device thickness increases
Solution Approach 1:
The patent transitions from conventional point light sources to a line-shaped light source that extends along the display surface. This dimensional change allows the light to be distributed uniformly across the display area without requiring the light source to be positioned far from the emitting surface, thus achieving both uniform brightness and thin device profile.
Solution Approach 2:
The patent introduces a light guide plate as an intermediary component between the line light source and the display surface. This light guide plate diffuses and redistributes the light from the line source to achieve uniform brightness distribution across the entire display area, eliminating the need for direct positioning of light sources far from the surface.
2Length of stationary object
If conventional backlighting methods are used with light sources close to the light-emitting surface, then device thickness is reduced, but brightness uniformity deteriorates with visible bright spots
Solution Approach 1:
The patent employs a line-shaped light source that extends along the display surface rather than using discrete point sources. This dimensional extension allows the light to be naturally distributed across the display area, achieving uniform brightness even when the light source is positioned close to the emitting surface, thus maintaining thin device profile without sacrificing brightness uniformity.
Solution Approach 2:
The light guide plate serves as a critical intermediary that receives light from the line source and redistributes it uniformly across the display surface. This intermediary component enables the system to maintain close proximity between light source and emitting surface while eliminating visible bright spots through effective light diffusion and redistribution.
3Illumination intensity
If multiple lenses and diffusers are used to achieve uniform brightness, then illumination quality is improved, but device complexity and thickness increase
Solution Approach 1:
The patent merges the light source and light distribution functions into a single integrated line-shaped light source system with a light guide plate. This consolidation eliminates the need for multiple separate lenses and diffusers, reducing structural complexity while maintaining uniform brightness distribution across the display surface.
Solution Approach 2:
By transitioning to a line-shaped light source that extends along the display surface, the patent achieves uniform light distribution through geometric configuration rather than requiring multiple optical components. This dimensional approach simplifies the overall structure by replacing complex multi-component systems with a more straightforward line source and light guide plate configuration.
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 solution effectively generates a soft, even, and uniform line source of light, enhancing the aesthetic appeal and reducing eye fatigue by ensuring consistent brightness across the light-emitting surface.
Implementation Method 1
the illumination is arranged to be reflected and diffracted by the first inclined reflection surface
Implementation Method 2
the illumination is arranged to be reflected and diffracted by the first vertical optical surface
Implementation Method 3
the illumination is arranged to be reflected and diffracted by the first prisms to produce an uniform line source of light
Data Source
AI summary
A backlight illuminating module includes a first supporting base, a plurality of first illuminating units, and a light reflection housing. The light reflection housing includes a first light reflection member having a first inclined reflection surface, a first vertical optical surface and a plurality of first prisms provided in a first light reflection chamber, wherein when the first illuminating units are activated to generate illumination, the illumination is arranged to be reflected and diffracted by the first inclined reflection surface, the first vertical optical surface and the first prisms to produce an uniform line source of light of the backlight illuminating module.