Wide Angle Backlight Lens Aspheric Free-Form Surfaces
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Solution Overview
Problem
Existing backlight lenses have limitations such as small light diffusion range, low luminous intensity, non-uniform flares, and a large, bulky design that does not meet modern application requirements, particularly with a minimum PCB plate width of 15 mm and limited mounting scope.
Innovation Solution
A wide angle backlight lens design featuring a lens mounting plate and body with aspheric free-form surfaces, wavy reflective apertures, and eight mutually-perpendicular assembling stands that reduce the required PCB plate width and enhance light diffusion and luminous intensity, allowing for improved flare uniformity and easier assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a sphere is used to reflect convergent light rays, then the structure is simple, but the light diffusion range is small and luminous intensity is low
Solution Approach 1:
The patent employs aspheric free-form surfaces instead of simple spherical surfaces. The aspheric surfaces provide curved geometry that optimizes light reflection and diffusion, achieving wider light diffusion range and higher luminous intensity while maintaining manufacturing feasibility through precise surface profiling.
Solution Approach 2:
The patent changes the surface geometry parameters from simple spherical to complex aspheric free-form surfaces. This parameter change optimizes the optical performance by controlling light ray paths, achieving improved light diffusion and luminous intensity without requiring fundamentally different structural approaches.
2Volume of moving object
If existing backlight lens design is used, then the structure is conventional, but the PCB plate width must be at least 15 mm resulting in large volume
Solution Approach 1:
The patent divides the mounting structure into eight discrete assembling stands arranged in two mutually-perpendicular cuboids. This segmentation allows the lens to be mounted on a smaller PCB plate (reducing width requirement below 15 mm) while maintaining stability and ease of assembly through multiple distributed mounting points.
Solution Approach 2:
The patent transitions from a conventional single-plane mounting approach to a three-dimensional arrangement of assembling stands forming two mutually-perpendicular cuboids. This dimensional change enables compact mounting on smaller PCB plates while providing robust mechanical support and simplifying the overall assembly process.
3Area of stationary object
If existing backlight lens is used, then the mounting scope is limited, but the volume is relatively large
Solution Approach 1:
By segmenting the mounting structure into eight discrete assembling stands arranged in compact cuboidal configurations, the patent increases the effective mounting scope on the PCB plate while keeping the overall lens volume small. The distributed mounting points provide broad mounting coverage without requiring large device dimensions.
Solution Approach 2:
The patent changes the mounting configuration parameters from conventional single-plane arrangements to three-dimensional cuboidal arrangements of assembling stands. This parameter change enables the lens to achieve larger mounting scope on the PCB plate while maintaining compact overall volume through optimized spatial distribution of mounting points.
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 design improves light diffusion and luminous intensity, reduces the PCB plate width requirement, and simplifies assembly, resulting in a more efficient and practical backlight solution that meets modern application needs.
Implementation Method 1
Reflective aperture is designed as a wavy aperture featuring an aspheric free-form surface; the inner bottom surfaces of both luminous slot and lamp mounting slot are aspheric free-form surfaces. Light rays reflected by an aspheric surface are available for convergence and divergence of light rays according to actual needs
Implementation Method 2
Reflective aperture is designed as a wavy aperture featuring an aspheric free-form surface; Light rays reflected by an aspheric surface are available for convergence and divergence of light rays
Data Source
AI summary
The present invention discloses a wide angle backlight lens which consists of lens mounting plate and lens body. Further, the upper outer surface of lens body is fixedly connected with the central position of the lower outer surface of lens mounting plate. Four sets of lens stands are installed near four corners of the upper outer surface of said lens mounting plate. Each set of said lens stands consists of two assembling stands. The luminous slot (4) is installed in the central position of the lower outer surface of said lens body (2) and lamp mounting slot (5) and reflective aperture (6) are installed in the central position of the upper outer surface of said lens mounting plate (1). A wide angle backlight lens described in the present invention is available for convergence and divergence of light rays according to actual needs, to improve the range of light diffusion and luminous intensity, hence realizing a higher uniformity of flares. Further, in respect of assembly, it could reduce the width of PCB, and direction detection is not required when the lens is travelling along the vibration plate rail, hence improving lens mounting efficiency and bringing a better application prospect.