Dual Display Light Guide Plate Merging Backlight Modules
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Solution Overview
Problem
Current dual liquid crystal display devices require two sets of backlight modules, leading to increased size and weight due to the need for both direct and edge type backlight modules, which compromises thickness and weight efficiency.
Innovation Solution
A dual display device design incorporating a light source module with a light guide plate, prism sheets, and a color conversion film, where microstructures and prism columns enhance light refraction and reflection, allowing for efficient light utilization and emission on both sides with a single light source module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two sets of backlight modules are used for dual display, then the display function is achieved, but the size and weight increase
Solution Approach 1:
The patent merges two separate backlight modules into a single integrated backlight module that serves both display panels. The light guide plate is designed with a light incident surface and two light exit surfaces, allowing one light source to illuminate both panels simultaneously, thereby reducing the overall weight and size while maintaining dual display functionality
Solution Approach 2:
The single backlight module is designed to perform multiple functions by providing light to two different display panels through its dual light exit surfaces. The light guide plate structure enables one module to serve as the backlight source for both the first and second display panels, achieving multi-functionality with a single component
2Adaptability or versatility
If two sets of backlight modules are used for dual display, then the display function is achieved, but the thickness increases
Solution Approach 1:
The patent merges two separate backlight modules into a single integrated backlight module that serves both display panels. The light guide plate is designed with a light incident surface and two light exit surfaces, allowing one light source to illuminate both panels simultaneously, thereby reducing the overall thickness while maintaining dual display functionality
Solution Approach 2:
The light guide plate utilizes a three-dimensional structure with a light incident surface and two opposing light exit surfaces, distributing light in multiple directions. This spatial arrangement allows a single backlight module to serve two panels without increasing thickness, as the light is directed through different spatial paths from the same source
3Use of energy by moving object
If a light guide plate with microstructures and prism sheets is used, then light utilization efficiency is improved, but the structure complexity increases
Solution Approach 1:
The light guide plate incorporates microstructures at specific locations (light incident surface and light exit surfaces) to control light behavior locally. Prism sheets are positioned at particular areas to redirect light, and color conversion films are placed where needed, allowing efficient light management through localized structural modifications rather than uniform complexity throughout the entire module
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 thinner thickness and lighter weight by improving light utilization efficiency and color conversion, enabling a single light source module to meet double-sided display requirements.
Implementation Method 1
the light guide plate of the light source module has a plurality of first microstructures, when the light is irradiated on the first microstructures, part of the light may be refracted and emitted from the first light exit surface
Implementation Method 2
part of the light is reflected and emitted from the second light exit surface
Implementation Method 3
The first prism sheet includes a plurality of first prism columns disposed on a side of the first prism sheet facing away the first light exit surface
Data Source
AI summary
A dual display device includes a light source module, a first display panel and a second display panel. The light source module includes a light guide plate, a first prism sheet, a second prism sheet, a color conversion film, and a light source. The light guide plate has a first light exit surface, a second light exit surface and a light incident surface. The first light exit surface has a plurality of first microstructures. The first prism sheet is disposed beside the first light exit surface. The second prism sheet is disposed beside the second light exit surface. The color conversion film is disposed at least one of between the first prism sheet and the first light exit surface and between the second prism sheet and the second light exit surface. The dual display device of the invention has the advantages of thinner thickness and lighter weight.