Reflecting Layer Segmentation for Mirror Display Transmittance
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Solution Overview
Problem
Mirror-type display devices face issues with deteriorated display quality due to increased reflectance, transmittance loss, and moisture permeation through the reflecting layer, which affects both reflected and displayed images.
Innovation Solution
The implementation of a display device design featuring a reflecting layer with strategically placed openings and a sealant to prevent moisture ingress, combined with a second reflecting layer for enhanced reflectivity, improves image quality in mirror mode and maintains display image transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the reflecting layer is made with high reflectance material to improve mirror function, then the reflectivity is improved, but the transmittance of display image deteriorates
Solution Approach 1:
The reflecting layer is divided into different regions with different reflectance characteristics. The first region (peripheral area) has high reflectance for mirror function, while the second region (display area) has lower reflectance/higher transmittance for display quality. This local differentiation resolves the contradiction by allowing both high reflectivity and good display quality in different areas.
2Illumination intensity
If the reflecting layer is made continuous to improve mirror image quality, then the reflectivity is improved, but moisture permeation increases
Solution Approach 1:
The reflecting layer is segmented into multiple discrete regions (first region and second region) separated by gaps or non-reflecting areas. This segmentation maintains sufficient reflectivity for mirror function while creating barriers that prevent moisture permeation through the reflecting layer, thus resolving the contradiction between mirror image quality and moisture resistance.
3Illumination intensity
If the reflecting layer covers the entire substrate to improve mirror function, then the reflectivity is improved, but the display image transmittance deteriorates
Solution Approach 1:
The reflecting layer is selectively applied to different regions of the substrate with different optical requirements. The peripheral region receives high reflectance coating for mirror function, while the display region receives reduced or optimized reflectance coating to maintain light transmittance for display quality, thus resolving the contradiction between overall reflectivity and display image transmittance.
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 the quality of reflected images in mirror mode while maintaining high transmittance for displayed images, effectively preventing moisture from entering the device.
Implementation Method 1
The mirror-type display device includes a reflecting layer for reflecting light so as to serve as a mirror
Implementation Method 2
a sealant at the peripheral area between the lower substrate and the upper substrate, wherein the one or more first openings may overlap at least one selected from the sealant and the peripheral area at an outer side of the sealant
Data Source
AI summary
A display device includes a reflecting layer. A display device according to an exemplary embodiment of the present invention includes: a lower substrate; an upper substrate facing the lower substrate; a thin film transistor on the lower substrate; and a first reflecting layer on a first surface of the upper substrate, the first surface facing the lower substrate, in which the lower substrate and the upper substrate include a display area for displaying an image, and a peripheral area outside the display area, and wherein the first reflecting layer is at the peripheral area, at display area, and at an area adjacent an edge of the upper substrate.