Display Electrode Segmentation for Light Transmissivity
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Solution Overview
Problem
In display apparatuses, particularly organic light-emitting display apparatuses, the formation of a uniform opposite electrode using a metal mask can lead to incomplete coverage, impeding full screen display due to inadequate formation in certain areas, which affects light transmissivity.
Innovation Solution
A method and structure where a substrate is divided into areas with different light transmissivity, using a transmissive conductive material for one pixel electrode and a reflective conductive material for another, along with a liquid-repelling layer to enhance light transmissivity, and forming a third electrode between intermediate layers to ensure proper contact and reduce electrode damage during processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a metal mask is used to form an opposite electrode, then uniform thickness is achieved, but incomplete coverage occurs in certain areas impeding full screen display
Solution Approach 1:
The opposite electrode is segmented into multiple regions with different transmissivity characteristics. A first opposite electrode with first transmissivity is formed in a first area, and a second opposite electrode with second transmissivity is formed in a second area, allowing each region to be optimized independently for both uniformity and coverage
Solution Approach 2:
Different areas of the opposite electrode are assigned different local qualities in terms of light transmissivity. The first area has a first light transmissivity while the second area has a second light transmissivity, enabling each region to perform its specific function optimally while achieving complete coverage
2Area of stationary object
If the opposite electrode is formed to cover the entire screen, then full screen display is achieved, but light transmissivity is reduced
Solution Approach 1:
Different areas of the opposite electrode are assigned different local qualities in terms of light transmissivity. The first area has a first light transmissivity while the second area has a second light transmissivity, enabling each region to perform its specific function optimally while achieving complete coverage
Solution Approach 2:
The opposite electrode is segmented into multiple regions with different transmissivity characteristics. A first opposite electrode with first transmissivity is formed in a first area, and a second opposite electrode with second transmissivity is formed in a second area, allowing each region to be optimized independently for both uniformity and coverage
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 allows for selective and enhanced light transmissivity in specific areas, improving the display's ability to achieve full screen functionality and maintain electrode integrity, thereby addressing the issue of incomplete electrode formation.
Implementation Method 1
a liquid-repelling layer to enhance light transmissivity
Data Source
AI summary
According to an aspect of the invention, a display apparatus includes: a substrate comprising a first area and a second area; a first pixel electrode in the first area and a second pixel electrode in the second area; a first intermediate layer disposed on the first pixel electrode and a second intermediate layer disposed on the second pixel electrode; a first opposite electrode facing the first pixel electrode with the first intermediate layer therebetween and having a first light transmissivity; and a second opposite electrode facing the second pixel electrode with the second intermediate layer therebetween and having a second light transmissivity lower than the first light transmissivity.