Reflecting Member Aperture Design for Dual Display Mirror Function
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Solution Overview
Problem
Existing display devices lack a practical method to integrate a mirror function while maintaining their primary display functionality, especially in portable and slim-type designs, where external light reflection is not effectively utilized.
Innovation Solution
A display device design that incorporates a reflecting member with a first reflecting unit on the lower surface of the substrate, featuring an aperture overlapping the light emission area, and a second reflecting unit, which can be transparent, to achieve both display and mirror functions without compromising light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reflecting member is added to enable mirror function, then the device achieves dual functionality (display and mirror), but the device structure becomes more complex
Solution Approach 1:
The reflecting member is designed to serve dual purposes: reflecting external light for mirror function and allowing light emission from the display. By positioning the reflecting member at the lower surface of the substrate and creating an aperture overlapping the light emission area, the same component enables both display and mirror functions without requiring separate structures for each function.
2Illumination intensity
If the aperture size is reduced to improve mirror reflection, then reflection quality improves, but light emission efficiency decreases
Solution Approach 1:
The reflecting member has non-uniform structure with different regions serving different functions: the aperture region allows light emission while the surrounding reflecting surface provides mirror reflection. The aperture size is specifically designed to be smaller than the light emission area, creating local quality differentiation that optimizes both reflection quality and light emission efficiency in their respective zones.
3Reliability
If a transparent second reflecting unit is added to protect the first reflecting unit, then manufacturing damage is prevented, but the structure becomes more complex
Solution Approach 1:
The transparent second reflecting unit acts as an intermediary protective layer between the first reflecting unit and the external environment. This transparent material protects the first reflecting unit from manufacturing damage and moisture infiltration while allowing light to pass through, thus protecting the reflective structure without significantly increasing optical complexity.
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 enables the display device to function as both a mirror and a display, with the reflecting member effectively reflecting external light and minimizing light leakage, while preventing damage during manufacturing processes and moisture infiltration.
Implementation Method 1
a reflecting member on a lower surface of the first substrate... the first reflecting unit having an aperture at a position overlapping the light emission area
Data Source
AI summary
A display device includes a first substrate, a pixel defining layer on the first substrate, the pixel defining layer configured to define a light emission area, a first electrode in the light emission area, a light emitting layer on the first electrode, a second electrode on the light emitting layer, a second substrate which is opposite to the first substrate, and a reflecting member on a lower surface of the first substrate. The reflecting member may include a first reflecting unit on the lower surface of the first substrate, the first reflecting unit having an aperture at a position overlapping the light emission area, and a second reflecting unit on the first reflecting unit.