Horizontally Divided Organic EL Layers for Image Display
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Solution Overview
Problem
Conventional image displays using organic electronic luminescent (EL) elements increase manufacturing costs and complexity due to the need for multiple stacked light emitting layers, which also result in higher electric current per pixel unit.
Innovation Solution
The image display features a light emitting unit with multiple organic EL layers horizontally divided and electrically connected in series within each pixel area, reducing the number of manufacturing steps and costs while maintaining efficient light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple light emitting layers are stacked vertically to enhance luminance per pixel unit, then luminance is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent transitions from vertical stacking of multiple light emitting layers to a single layer containing multiple horizontally arranged light emitting regions. This dimensional change from vertical (z-axis) to horizontal (x-y plane) arrangement maintains the series connection capability while eliminating the complexity of multiple stacked layers, thus resolving the contradiction between luminance enhancement and device complexity reduction
2Use of energy by moving object
If multiple light emitting layers are stacked vertically to reduce electric current per pixel unit, then current consumption is improved, but manufacturing complexity increases
Solution Approach 1:
The invention arranges multiple light emitting regions horizontally within a single layer rather than stacking them vertically across multiple layers. This horizontal arrangement achieves series connection for reduced current consumption while requiring only one manufacturing process cycle, thereby resolving the contradiction between energy efficiency and manufacturing ease
3Use of energy by moving object
If multiple light emitting layers are stacked to achieve series connection, then electric current per pixel is reduced, but manufacturing cost increases
Solution Approach 1:
The patent implements series connection of multiple light emitting regions within a single layer through horizontal arrangement, eliminating the need for multiple vertical stacking layers. This approach maintains the current-reducing benefit of series connection while avoiding the increased manufacturing cost associated with multiple layer fabrication processes
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 approach simplifies the manufacturing process, reduces the electric current per pixel unit, and achieves cost-effective image display technology while maintaining effective light emission.
Implementation Method 1
employing an organic EL element which emits light by recombining positive holes and electrons injected into a light emitting layer
Data Source
AI summary
An image display according to one aspect of the present invention includes a light emitting unit that is located in each unit pixel area in each, emits light corresponding to an injected electric current, and includes a plurality of light emitting layers which are horizontally divided into. The plurality of light emitting layers are electrically connected in series.