Bent Plate Backlight Module for Thin Double-Sided Displays
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Solution Overview
Problem
Conventional double-sided liquid crystal display devices are thick due to the arrangement of backlight modules, which hinders their integration into thin-type electronic products, necessitating a reduction in thickness to enhance market competitiveness.
Innovation Solution
A backlight module design featuring a bent plate with grooves on both surfaces for housing light sources, allowing them to be positioned on a single reference plane, thereby reducing the module's thickness and improving light convergence and utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional backlight modules with cold cathode fluorescent lamps and reflection plates are used in double-sided liquid crystal display devices, then the devices can display two frames simultaneously, but the thickness of the devices becomes excessively large
Solution Approach 1:
The patent merges two separate backlight modules into a single integrated module. The bent plate structure allows light sources to be positioned on one reference plane, with the plate serving both to support light sources and to reflect light to both liquid crystal display panels simultaneously. This integration eliminates the need for separate reflection plates and reduces overall thickness while maintaining double-sided display capability.
Solution Approach 2:
The patent introduces a bent plate configuration that changes the spatial arrangement from a conventional planar layout to a three-dimensional folded structure. The plate is bent at an angle (typically 90 degrees) to form a corner reflector configuration, allowing light to be redirected to both front and rear panels. This dimensional change enables light sources to illuminate both sides without requiring increased thickness.
2Illumination intensity
If multiple cold cathode fluorescent lamps and reflection plates are arranged to provide light to both liquid crystal display panels, then both panels can be illuminated, but the number of light sources and components increases, raising manufacturing costs and electricity consumption
Solution Approach 1:
The bent plate serves multiple functions simultaneously: it acts as a structural support for mounting light sources, functions as a reflection surface to redirect light to both liquid crystal display panels, and serves as a spacing element to maintain proper distances between components. This multi-functionality reduces the total component count while ensuring adequate illumination for both displays.
Solution Approach 2:
The single integrated backlight module structure enables light sources to automatically serve both display panels through the geometric configuration of the bent plate. The reflection geometry is designed so that light emitted by the sources naturally reaches both front and rear panels without requiring additional control mechanisms or separate lighting systems, reducing both component quantity and energy consumption.
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 proposed design significantly decreases the thickness of double-sided liquid crystal display devices, enhances light utilization, and reduces the number of light sources required, leading to lower electricity consumption and manufacturing costs.
Implementation Method 1
The plate is bent to form a plurality of first grooves on the first surface and a plurality of second grooves on the second surface. The light sources are respectively disposed in the first grooves and the second grooves.
Data Source
AI summary
A backlight module includes a plate and a plurality of light sources. The plate has a first surface and a second surface opposite to the first surface. The plate is bent to form a plurality of first grooves on the first surface and a plurality of second grooves on the second surface. The light sources are respectively disposed in the first grooves and the second grooves. The backlight module is capable of providing two plane light sources to different directions and has thinner thickness. A double-sided liquid crystal display using the above-mentioned backlight module is also provided.