Circular Light Emitting Layer Mirror Display Device

The light emitting layer is designed with a circular shape in plan view, which simplifies the geometric relationship between the light emitting layer and mirror layer. This circular configuration, combined with a constant distance between layers, eliminates alignment issues that would occur with rectangular or irregular shapes, as there is only one orientation for a circle. The curvature principle resolves the contradiction by making the structure inherently alignment-tolerant while maintaining clear area distinction.

The mirror layer is designed with different portions: an overlapping mirror layer portion that overlaps the pixel defining layer and a non-overlapping mirror layer portion that does not. This local differentiation allows the overlapping region to provide clear area distinction while the non-overlapping region avoids manufacturing misalignment issues. The local quality principle enables different functional zones within the same component to address different requirements.

The light emitting layer adopts a circular shape in plan view, which provides uniform image quality across all viewing directions. This circular geometry inherently ensures radial symmetry, meaning the display quality is consistent regardless of the viewing angle. The curvature principle simplifies the requirement for multiple adjustment mechanisms that would otherwise be needed to achieve uniformity, thereby not significantly increasing device complexity despite the geometric change.

The circular light emitting layer serves multiple functions: it provides uniform image quality, simplifies alignment with the mirror layer (since circles have rotational symmetry), and defines both the image area and mirror area boundaries. This multi-functionality reduces the need for additional components, offsetting the initial perception of increased complexity.

The overlapping mirror layer portion and non-overlapping mirror layer portion are merged into a single continuous mirror layer structure. This merging ensures that the entire mirror layer contributes to either reflecting display light or providing mirror function, eliminating gaps or dark portions that would occur if the layers were separate or misaligned. The combination of overlapping and non-overlapping portions creates complete coverage without dead zones.

The problem of dark portions is solved by considering the vertical dimension (thickness direction) in addition to the planar dimensions. The mirror layer is positioned at a constant distance from the light emitting layer in the thickness direction, creating a three-dimensional relationship that ensures continuous optical path coverage. This dimensional approach allows light to be reflected effectively while eliminating regions where neither function operates.