Reflective Layer Cathode Contact for OLED Luminance
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Solution Overview
Problem
Existing organic light emitting display devices face challenges in achieving optimal luminance and simplifying manufacturing processes while maintaining high image quality and low power consumption.
Innovation Solution
The organic light emitting display device incorporates a reflective layer that electrically contacts the cathode of the organic light emitting diode, improving voltage deviation and luminance without the need for additional partitions, thereby simplifying the manufacturing process and enhancing image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflective layer is added to improve luminance and address voltage deviation, then image quality and luminance are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The reflective layer is designed to serve multiple functions simultaneously: it reflects light to enhance luminance in the light emitting area, and acts as an electrical contact to address voltage deviation issues. This multi-functionality resolves the contradiction by improving luminance without requiring additional separate components, thereby avoiding increased device complexity
Solution Approach 2:
The patent merges the optical function (light reflection) and electrical function (cathode contact) into a single reflective layer structure. By combining these functions in one component rather than using separate elements, the device complexity is minimized while achieving both luminance improvement and voltage deviation correction
2Manufacturing precision
If additional partitions are added to address voltage deviation, then voltage uniformity is improved, but manufacturing process complexity increases
Solution Approach 1:
The reflective layer is designed to serve multiple functions simultaneously: it reflects light to enhance luminance in the light emitting area, and acts as an electrical contact to address voltage deviation issues. This multi-functionality resolves the contradiction by improving luminance without requiring additional separate components, thereby avoiding increased device complexity
Solution Approach 2:
The patent extracts the voltage deviation correction function from the partition structure and integrates it into the reflective layer. By removing the need for separate partitions and incorporating the electrical contact function directly into the reflective layer, manufacturing process complexity is reduced while maintaining voltage uniformity
3Area of stationary object
If the aperture ratio is increased to improve display area, then image quality is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes the vertical dimension by extending the reflective layer into the second area adjacent to the light emitting area. This three-dimensional arrangement allows the reflective layer to provide electrical contact functionality without occupying horizontal space that would reduce the aperture ratio, thereby maintaining high display area while avoiding increased manufacturing precision requirements
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 enhances luminance and simplifies the manufacturing process by addressing voltage deviation issues without additional configurations, improving image quality and aperture ratio.
Implementation Method 1
a reflective layer disposed in a second area adjacent to the first area. The reflective layer electrically contacts a cathode of the organic light emitting diode
Implementation Method 2
An organic light emitting device among flat panel display devices is a self-luminescent display device that emits light by electrically exciting an organic compound
Data Source
AI summary
Disclosed is an organic light emitting display device including: an organic light emitting diode disposed in a first area of a substrate; and a reflective layer disposed in a second area adjacent to the first area. The reflective layer electrically contacts a cathode of the organic light emitting diode.