Organic EL Panel with Laser Light Guide for Color Tuning
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Solution Overview
Problem
The existing organic EL panels with RGB separation structures face limitations in aperture ratio, making it difficult to increase luminous flux while maintaining panel life, and lack user-adjustable color emission.
Innovation Solution
An organic EL panel design featuring a first and second substrate with a sealing layer, where one substrate includes a light incident section and a light guide section to direct laser light in-plane, allowing for color tuning by mixing laser light with organic EL emission, thereby increasing luminous flux without restricting aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RGB light emission layers are formed separately to achieve color adjustment, then color tuning capability is improved, but aperture ratio is restricted and luminous flux emission is reduced
Solution Approach 1:
The invention separates the color adjustment function from the light emission function by introducing an external laser light source that can be independently controlled, while the organic EL layer focuses on efficient light emission. This segmentation allows color tuning without sacrificing aperture ratio or luminous flux.
Solution Approach 2:
The patent introduces laser light as an intermediary element that mixes with the organic EL emission to achieve color adjustment. The laser light acts as a mediator between the fixed organic EL emission and the desired可调 color output, enabling color tuning without modifying the organic EL layer structure.
2Productivity
If driving current is increased to increase luminous flux emission, then luminous flux is improved, but panel life is shortened
Solution Approach 1:
The invention merges the organic EL emission with external laser light to achieve higher overall luminous flux. By combining these two light sources, the system can increase total light output without increasing the driving current through the organic EL layer, thereby preserving panel life.
Solution Approach 2:
The organic EL panel is designed to serve multiple functions: it acts as both a light emission source and a color adjustment medium. The laser light source provides additional luminous flux while the organic EL layer contributes to color tuning, creating a multi-functional system that addresses both luminous flux and color adjustment needs without compromising panel life.
3Productivity
If aperture ratio is increased to increase luminous flux emission, then luminous flux is improved, but manufacturing complexity increases
Solution Approach 1:
The invention extracts the color adjustment function from the organic EL layer structure itself and relocates it to an external laser light source. This extraction allows the organic EL layer to maintain a simple structure with high aperture ratio for efficient light emission, while color tuning is achieved externally through laser mixing.
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 user-adjustable color emission and increased luminous flux from the organic EL panel, expanding its application in lighting and display devices without shortening the panel's lifespan.
Implementation Method 1
the light guide section has a total reflection surface that reflects laser light in an in-plane direction
Implementation Method 2
an organic EL panel provided with an organic EL element (organic EL layer)
Data Source
AI summary
The present invention provides a novel organic EL panel adapted to be color tunable by a user, for example. An organic EL panel 10 of the present invention includes: a first substrate 11; a second substrate 12; an organic EL element 13; and a sealing layer 14. One surface of the first substrate 11 is a mounting surface on which the organic EL element 13 is disposed. The first substrate 11 and the second substrate 12 are laminated in such a manner that the mounting surface of the first substrate 11 and one surface of the second substrate 12 face each other with the sealing layer 14 interposed therebetween. The sealing layer 14 seals a gap between the first substrate 11 and the second substrate 12 along an entire periphery of a region where the first substrate 11 and the second substrate 12 face each other. The first substrate 11 includes a light incident section 15 on which laser light is incident and a light guide section 16 that directs the incident laser light in an in-plane direction.