Reflective Display Gas Layer Light Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display technologies, particularly transmissive and self-illuminating display panels, suffer from strong light reflection issues under ambient light, leading to light leakage at the edges of display devices, which reduces visibility and efficiency.
Innovation Solution
A reflective display device is designed with a light guide plate and transparent medium layers, where at least one of these layers is a gas layer with a refractive index lower than the adjacent layers, effectively suppressing light leakage by total internal reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If optically-clear adhesive is used to bond the light guide plate and cover lens, then bonding strength is improved, but light leakage occurs at the edge due to similar refractive index causing light penetration
Solution Approach 1:
The patent changes the refractive index parameter of the bonding medium by replacing optically-clear adhesive with a gas layer (air gap). This parameter change creates a significant refractive index difference between the light guide plate and the medium above it, enabling total internal reflection of light at the interface and preventing light leakage at the edges while maintaining bonding function through alternative means.
2Ease of operation
If transmissive or self-illuminating display panel is used, then display functionality is achieved, but strong light reflection occurs under ambient light reducing visibility
Solution Approach 1:
The patent converts the harmful effect of strong ambient light reflection into a beneficial feature by using a reflective display panel design. Instead of trying to prevent reflection, the design embraces it by using the reflected ambient light as the illumination source for the display, thereby improving visibility in outdoor conditions while maintaining display functionality.
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 use of a gas layer with a lower refractive index between the light guide plate and other elements significantly reduces light leakage at the edges of the display device, enhancing visibility and light utilization.
Implementation Method 1
a refractive index of the gas layer is less than refractive indexes of the two adjacent ones of the electrical or optical element layers
Data Source
AI summary
A display device including a reflective display panel, a plurality of electrical or optical element layers, and at least one light-emitting element is provided. The electrical or optical element layers are stacked above the reflective display panel. One of the electrical or optical element layers is a light guide plate. The light-emitting element is disposed beside the light guide plate. A plurality of transparent medium layers are respectively located between every two adjacent ones of the reflective display panel and the electrical or optical element layers and above the electrical or optical element layer most away from the reflective display panel among the electrical or optical element layers. At least one of the transparent medium layers above the light guide plate is a gas layer.