Curved Transparent Substrate Dual-Sided Light Source Display
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Solution Overview
Problem
Existing display devices using polymer dispersed liquid crystal (PDLC) panels face challenges in achieving high display quality due to insufficient light emission and visibility issues, particularly when the light source unit emits light to only one side of the substrate.
Innovation Solution
The display device incorporates a first transparent substrate with a curved side surface, a flexible display panel, and a light source unit that emits light to both sides of the substrate, enhancing light propagation and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source unit emits light to only one side of the substrate, then the device complexity is reduced, but the luminance level and visual recognition are insufficient
Solution Approach 1:
The patent transitions from single-sided light emission to dual-sided light emission by adding a second light source unit on the opposite side of the substrate. This dimensional change in light emission configuration resolves the contradiction by providing sufficient luminance while maintaining reasonable device complexity through symmetric design
2Ease of operation
If the light source unit emits light to both sides of the substrate, then the luminance level and visual recognition are improved, but the device complexity increases
Solution Approach 1:
The patent employs asymmetric positioning of light source units relative to different observation angles. By configuring light sources on both sides of the substrate, the system achieves superior visual recognition from multiple viewing directions while the asymmetric arrangement allows optimization of each light source's position and intensity to balance performance with complexity
Solution Approach 2:
The dual-sided light source configuration serves multiple functions simultaneously: it provides illumination for display visibility, enables viewing from opposite sides, and compensates for light absorption in the liquid crystal layer. This multi-functionality justifies the increased device complexity by delivering comprehensive performance improvements
3Illumination intensity
If the first transparent substrate has a curved side surface, then light propagation is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent deliberately introduces curvature to the side surface of the first transparent substrate to enhance light propagation through total internal reflection and reduce light loss. This curvature design resolves the contradiction by improving illumination efficiency while the curvature radius can be optimized to balance optical performance with manufacturability
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 configuration increases the luminance level and improves the visual recognition of display images, leading to enhanced display quality and reduced power consumption.
Implementation Method 1
a light source unit that emits light to both sides of the substrate
Implementation Method 2
a first transparent substrate with a curved side surface
Data Source
AI summary
According to one embodiment, a display device includes a first transparent substrate, a display panel, a first fixing member, and a first light source unit. The first transparent substrate has a first light incident surface which is a side surface, and is formed to be curved. The display panel has flexibility. The first fixing member fixes the display panel to the first transparent substrate. The first light source unit is opposed to the first light incident surface to emit light to the first light incident surface.