Segmented Back Plate for Curved Display Uniform Illumination
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Solution Overview
Problem
Conventional backlight units for curved display devices require molds and precise designs for uniform light irradiation, leading to high manufacturing costs and the need for frequent re-fabrication to accommodate different luminous flux and light source configurations.
Innovation Solution
A backlight unit with a bent curved back plate, featuring planar sections arranged in a concentric circle pattern, allowing for easy installation of light sources without a mold, and including a light diffusion sheet and spacer members for uniform light distribution, enabling various backlight unit shapes and increased durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mold is used to form the curved back plate, then the back plate can be precisely formed, but the manufacturing cost increases
Solution Approach 1:
The curved back plate is divided into multiple planar sections that are arranged in a circumferential direction on a concentric circle. Each planar section can be manufactured separately using standard flat panel techniques, then assembled to form the curved surface, eliminating the need for expensive curved molds while achieving the desired curved geometry
Solution Approach 2:
The back plate transitions from a traditional single curved surface to a multi-dimensional structure composed of flat sections arranged in a specific geometric pattern (concentric circle with circumferential arrangement). This dimensional reorganization allows flat panels to create a curved effect when viewed from the front, avoiding mold requirements
2Illumination intensity
If light sources are spaced apart by a constant distance, then uniform light irradiation is achieved, but the design complexity increases
Solution Approach 1:
The light source arrangement follows the segmented structure of the back plate, with light sources positioned on or near each planar section. This segmentation approach simplifies the design by allowing independent positioning on each section while maintaining overall uniformity through the concentric circular pattern
Solution Approach 2:
The light sources are arranged in a curved pattern that follows the concentric circle geometry of the back plate sections. This curved arrangement naturally provides uniform light distribution across the curved display panel surface, matching the panel's geometry and simplifying the irradiation design
3Stability of the object's composition
If the back plate is made rigid, then structural stability is improved, but the ability to form various shapes decreases
Solution Approach 1:
The back plate is segmented into multiple independent or semi-independent planar sections that can be manufactured using standard rigid flat panel techniques. These sections are then assembled in different configurations (e.g., concentric circular patterns) to create various curved shapes, allowing structural stability in each section while providing shape versatility through assembly variation
Solution Approach 2:
The back plate structure transitions from a fixed rigid form to a modular assembly where the same rigid sections can be dynamically reconfigured into different curved patterns. This allows the backlight unit to adapt to various display panel curvatures and shapes while maintaining the structural integrity of individual components
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 solution reduces manufacturing costs, simplifies light source positioning, and allows for the creation of various backlight unit shapes, including double-sided curved display devices with improved durability and uniform light distribution.
Implementation Method 1
a light diffusion sheet configured to diffuse light emitted from the light source so as to direct the light to the display panel
Data Source
AI summary
A backlight unit of a curved display device to irradiate a curved display panel with light comprises: a light source configured to emit light to the display panel; and a back plate including a plurality of planar sections, each having a predetermined width, arranged in a circumferential direction of the display panel on a concentric circle, the center point of which coincides with the center point of a virtual circle defined by the curved display panel, the planar sections of the back plate being bent relative to each other into a curved form such that the light source is installed to the respective bent sections of the bent curved back plate.