Backlight Unit Segmentation for Dual-Side Display
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Solution Overview
Problem
Conventional liquid crystal display (LCD) devices primarily display images in one direction and lack the capability to efficiently provide light for two-way displays with reduced manufacturing costs.
Innovation Solution
A display device design featuring a single light emitting member with a backlight unit that includes a combination of light guide plates and light-division light guide members, providing light to both sides of the display panels, reducing the number of optical components and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light emitting member is used to provide light to both display panels, then device complexity and manufacturing cost are reduced, but light distribution efficiency and brightness uniformity may deteriorate
Solution Approach 1:
The backlight unit is segmented into multiple light guide plates (first light guide plate, second light guide plate) and light-division light guide members that independently direct light to different display panels. This segmentation allows a single light emitting member to efficiently distribute light to multiple locations without compromising brightness uniformity.
Solution Approach 2:
Light guide plates and light-division light guide members serve as intermediary optical components that transmit and redirect light from the single light emitting member to both display panels. These intermediaries ensure efficient light distribution while maintaining brightness uniformity across different panels.
2Adaptability or versatility
If conventional LCD structures are used, then manufacturing process is simple, but two-way display capability and light utilization are limited
Solution Approach 1:
The backlight unit is designed with multi-functionality to support two-way display capabilities. The light guide plates and light-division light guide members can direct light to different display panels based on display requirements, enabling the same backlight structure to serve multiple display functions.
Solution Approach 2:
The patent introduces light-division light guide members that extend light paths in additional spatial dimensions, allowing a single light emitting member to illuminate multiple display panels positioned in different directions. This dimensional expansion enables two-way display capability without proportionally increasing structural complexity.
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
Enables the display of images in both directions with reduced component complexity and manufacturing costs, while maintaining effective light distribution to each display panel.
Implementation Method 1
a first exit light guide plate including a first exit surface, a first reflective surface, and first side surfaces connecting the first exit surface and the first reflective surface
Implementation Method 2
The backlight unit includes a light emitting element
Data Source
AI summary
A display device includes a first display panel including a display surface defined by first and second directions, a second display panel spaced apart from the first display panel in a third direction perpendicular to the display surface, and a backlight unit disposed between the first and second display panels to provide a light to the first and second display panels. The backlight unit includes a light emitting element, a first exit light guide plate, a second exit light guide plate spaced apart from the first exit light guide plate, a first light-division light guide member, and a second light-division light guide member.