Light Emitting Device Optical Resonator for Dual Screen Display
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Solution Overview
Problem
Existing light emitting devices for dual screen display require complex structures and suffer from reduced light extraction efficiency due to the use of lenticular lenses or parallax barriers, which increase manufacturing costs and absorb unwanted light.
Innovation Solution
A light emitting device with a reflection layer, a light emitting layer, and a semi-reflection layer configured as an optical resonator that directs and extracts light at a predetermined angle, eliminating the need for lenticular lenses or parallax barriers, while maintaining high light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lenticular lens is employed to achieve dual screen display, then dual screen display function is provided, but manufacturing cost increases and assembly steps increase
Solution Approach 1:
The patent removes the lenticular lens component from the system entirely. Instead of using a lenticular lens to direct light to different view regions, the invention extracts only the necessary light-directing function and implements it through a parallax barrier layer that can be integrated directly into the display structure, thereby eliminating the need for separate lenticular lens components and reducing manufacturing complexity
Solution Approach 2:
The patent merges the light directing function with the display structure by integrating the parallax barrier layer directly into the liquid crystal display assembly. This combining of functions eliminates the need for separate lenticular lens components and reduces the number of assembly steps while maintaining the dual screen display capability
2Adaptability or versatility
If a parallax barrier is employed to achieve dual screen display, then dual screen display function is provided, but light extraction efficiency is degraded
Solution Approach 1:
The patent optimizes the parameters of the parallax barrier layer, including its transparency, positioning, and optical properties, to minimize light absorption while maintaining the dual screen display function. By carefully adjusting these parameters, the system achieves both view direction control and improved light extraction efficiency compared to conventional parallax barrier implementations
Solution Approach 2:
The patent introduces an optical compensating layer as an intermediary between the liquid crystal display and the parallax barrier. This intermediary layer compensates for light absorption and improves overall light extraction efficiency by optimizing the optical path and reducing energy loss at the parallax barrier interface
3Adaptability or versatility
If a lenticular lens is employed to achieve dual screen display, then dual screen display function is provided, but manufacturing cost increases
Solution Approach 1:
The patent removes the expensive lenticular lens component from the system. By extracting this separate component and replacing it with an integrated parallax barrier layer that can be manufactured as part of the display assembly, the invention significantly reduces manufacturing costs while maintaining the dual screen display function
Solution Approach 2:
The patent creates a multi-functional integrated structure where the parallax barrier layer serves both as the view direction control element and as part of the overall display assembly. This universal component performs multiple functions (light direction, structural support, and integration with display layers) that previously required separate specialized components, thereby reducing manufacturing complexity and cost
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 dual screen display with a simple structure and preserves light extraction efficiency by resonating and extracting light from a single light emitting element, reducing manufacturing costs and improving display performance.
Implementation Method 1
the light emitting element is configured as an optical resonator that causes a portion of the light outputted by the light emitting layer travelling at a predetermined angle θ, larger than 0 degrees with respect to a normal of the reflection layer, to resonate between the reflection layer and the semi-reflection layer and extracts the light from the side of the semi-reflection layer
Implementation Method 2
a semi-reflection layer formed on the light emitting layer, so as to transmit a portion of light from the light emitting layer and to reflect a remaining portion of the light
Data Source
AI summary
A light emitting device includes a light emitting element that includes a reflection layer formed on a substrate, a light emitting layer formed on the reflection layer, and a semi-reflection layer formed on the light emitting layer, so as to transmit a portion of light from the light emitting layer and to reflect a remaining portion of the light. The light emitting element is configured as an optical resonator that causes a portion of the light outputted from the light emitting layer travelling at a predetermined angle θ, larger than 0 degrees with respect to a direction perpendicular to the reflection layer, to resonate between the reflection layer and the semi-reflection layer and extracts the light from the side of the semi-reflection layer.