Display Device Reflective Pattern and Half-Mirror Layer Design
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Solution Overview
Problem
Display devices experience lattice feeling and image degradation due to discontinuous reflecting areas and light diffraction between emitting and reflecting areas.
Innovation Solution
A display device design featuring a lower substrate with light-emitting structures and an upper substrate with a reflective pattern and half-mirror layer, where the half-mirror layer overlaps with the emitting areas and the reflective pattern covers the reflecting areas, reducing lattice feeling and light diffraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reflecting area is disposed between emitting areas in a display device, then the display device can serve as a mirror in non-display state, but the lattice feeling (discontinuous appearance) is perceived in the reflective image
Solution Approach 1:
The patent combines the reflecting area and emitting area into a unified structure where the lower substrate provides a continuous reflective surface that extends beneath both the reflecting area and emitting areas. This merging eliminates the discontinuity between separate reflecting and emitting regions, allowing the entire display device to function as a seamless mirror in non-display state while maintaining emission functionality.
2Productivity
If reflecting areas are discontinuously located due to emitting areas, then the display device can maintain emitting functionality, but the quality of the image is degraded due to diffraction of light
Solution Approach 1:
The patent introduces a lower substrate as an intermediary element that provides a continuous reflective surface beneath both the emitting areas and reflecting areas. This intermediary structure mediates between the discontinuous emitting areas and the requirement for a continuous reflective surface, preventing light diffraction at the boundaries between emitting and reflecting regions while preserving the emitting functionality of the display device.
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
The design minimizes lattice feeling and image degradation by ensuring a continuous reflective surface and reducing light diffraction, enhancing image quality and luminous efficacy.
Implementation Method 1
A reflective pattern is disposed on a lower surface of the upper substrate facing the lower substrate. The reflective pattern overlaps with the reflecting area of the upper substrate. A half-mirror layer is disposed on the lower surface of the upper substrate.
Implementation Method 2
The light-emitting structure includes a lower electrode, a light-emitting layer and an upper electrode, which are sequentially stacked.
Data Source
AI summary
A display device includes a lower substrate and an upper substrate opposite the lower substrate; a lower electrode on the lower substrate; a bank insulating layer on the lower substrate, the bank insulating layer covering an edge of the lower electrode; a light-emitting layer on a surface of the lower electrode exposed by the bank insulating layer; an upper electrode on the light-emitting layer; a reflective pattern on the upper substrate, the reflective pattern overlapping with the bank insulating layer; and a half-mirror layer on a surface of the upper substrate exposed by the reflective pattern.