Dual-Sided Light Guide Module for Thin Display Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current dual-screen liquid crystal display devices require two sets of backlight modules, leading to increased volume and weight due to the thickness of direct type backlight modules and the need for a light guide plate in edge type modules.
Innovation Solution
A light source module comprising a light guide plate with recessed microstructures, a first inverse prism sheet, and a second inverse prism sheet, which allows for double-sided light emission and improved brightness through light convergence, reducing the thickness and weight of dual-screen display devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a direct type backlight module is used, then brightness uniformity is improved, but thickness increases
Solution Approach 1:
The patent merges the light guide plate and light source functions into a single integrated module. The light guide plate contains embedded light emitting elements that directly generate light within the plate structure, eliminating the need for separate backlight modules for each screen, thus reducing thickness while maintaining brightness uniformity through the integrated design
Solution Approach 2:
The patent transitions from a traditional planar backlight structure to a three-dimensional integrated light guide plate with embedded light sources. The light emitting elements are positioned at specific depths and locations within the light guide plate, creating a volumetric light distribution that improves brightness uniformity while reducing overall module thickness
2Adaptability or versatility
If two sets of backlight modules are used for dual-screen display, then dual-sided display function is achieved, but volume and weight increase
Solution Approach 1:
The light guide plate is designed to perform multiple functions simultaneously: it serves as the light guide for both the first and second displaying panels, provides structural support, and contains the light source. This multi-functional design allows a single module to support dual-sided display without requiring two separate backlight modules, thereby reducing volume and weight
Solution Approach 2:
The patent combines two backlight module functions into one integrated light source module. The light guide plate structure is designed to emit light from both its first and second surfaces, allowing a single module to illuminate both displaying panels, thus eliminating the need for duplicate modules and reducing overall device volume and weight
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 light source module achieves thinner and lighter dual-screen display devices with effective double-sided light emission and enhanced brightness, meeting the requirements for dual-sided displays while minimizing volume and weight.
Implementation Method 1
The light guide plate has a first light emitting surface and a second light emitting surface opposite to the first light emitting surface, and a light incident surface connected between the first light emitting surface and the second light emitting surface
Implementation Method 2
The second light emitting surface has a plurality of microstructures. Each microstructure is a recessed structure. The recessed structure has a first surface that is inclined relative to the second light emitting surface
Implementation Method 3
The first inverse prism sheet includes a plurality of first prism columns. The second inverse prism sheet includes a plurality of second prism columns
Data Source
AI summary
A light source module includes a light guide plate, a first inverse prism sheet, a second inverse prism sheet, and a light source. The light guide plate has a light incident surface, a first light emitting surface and an opposing second light emitting surface. The second light emitting surface has a plurality of microstructures. Each microstructure is a recessed structure. The first inverse prism sheet is disposed beside the first light emitting surface of the light guide plate. The first inverse prism sheet includes a plurality of first prism columns. The first prism columns face the first light emitting surface. The second inverse prism sheet is disposed beside the second light emitting surface of the light guide plate. The second inverse prism sheet includes a plurality of second prism columns. The second prism columns face the second light emitting surface. The light source is disposed beside the light incident surface.