Bent Light Guide Plate Multi-Side Backlight Module
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Solution Overview
Problem
Conventional backlight modules in LCD displays are limited to one-directional light emission, requiring multiple modules for multi-directional display, increasing production costs and complexity.
Innovation Solution
A backlight module design featuring a light guide plate and optical assembly with bent portions, allowing light emission through lateral and upper surfaces, and using a simplified structure without a frame on one incidence side, enabling multi-side displaying with a single module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional backlight module is used with a frame structure, then the structural stability is improved, but the device complexity and production cost increase when multi-directional display is required
Solution Approach 1:
The light guide plate is bent at a specific angle (e.g., 45 degrees) to redirect light from the incidence side towards the display side, enabling light to reach the display panel through both the lateral surface and upper surface. This dimensional change in light path allows a single backlight module to illuminate multiple display surfaces simultaneously, eliminating the need for multiple separate modules.
Solution Approach 2:
The single backlight module is designed to perform multiple functions: it provides backlighting for both the lateral display surface and the upper display surface through the bent light guide plate structure. This multi-functionality allows one module to replace what would traditionally require multiple modules, simplifying the overall system structure.
2Adaptability or versatility
If multiple backlight modules are used for adjacent side displaying, then the display continuity is improved, but the production cost and assembly difficulty increase
Solution Approach 1:
Multiple light guiding functions that would traditionally require separate modules are merged into a single integrated backlight module. The bent light guide plate combines the functions of light redirection for adjacent sides into one component, allowing multiple display surfaces to be illuminated by a single module, thereby improving display continuity while simplifying assembly.
3Strength
If a frame structure is used in the backlight module, then the structural support is improved, but the production efficiency decreases due to increased assembly steps
Solution Approach 1:
The frame structure is removed from the backlight module design. The bent light guide plate itself serves as the structural element that provides both light redirection and mechanical support, eliminating the need for a separate frame component and reducing the number of assembly steps.
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 achieves multi-side backlighting with a simpler, cost-effective structure, enhancing display capabilities and assembly efficiency, and extending the application of display devices to include upper and side surface displays.
Implementation Method 1
a light guide plate, comprising a horizontal light guide plate body and a first bent portion near a non-incidence side; and an optical assembly, comprising a horizontal optical assembly body and a second bent portion located near the non-incidence side
Implementation Method 2
the optical assembly body is attached tightly to an upper surface of the light guide plate body, and the second bent portion is attached tightly to the first bent portion
Data Source
AI summary
Provided is a backlight module including a light guide plate having a horizontal light guide plate body and a first bent portion near a non-incidence side; and an optical assembly having a horizontal optical assembly body and a second bent portion near the non-incidence side, the optical assembly body is attached tightly to an upper surface of the light guide plate body, and the second bent portion is attached tightly to the first bent portion. Further provided is a display device having the backlight module. By removing the frame and the back plate portion on at least one incidence side and bending corresponding ends of the light guide plate and the optical assembly, multi-side backlight effect of the backlight module is achieved.