Transparent Display With Inclined Pixels for Higher Transmittance
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Solution Overview
Problem
The black matrix between subpixels in transparent display devices causes a deterioration of light transmittance and affects picture quality definition.
Innovation Solution
The transparent display device is designed with first and second signal lines spaced apart in different directions, forming a transmissive area between them, and pixels with inclined sides oriented towards this area, reducing the size of the black matrix and non-emission areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a black matrix is arranged between subpixels to avoid color mixture, then color isolation is improved, but light transmittance deteriorates
Solution Approach 1:
The patent applies asymmetry by inclined the sides of the pixel (first and second sides) relative to the first and second signal lines. This asymmetric orientation allows the black matrix to be positioned at specific inclined locations rather than forming a conventional symmetric grid, reducing its area while maintaining color isolation functionality. The asymmetric pixel configuration enables the black matrix to be minimized without compromising its purpose of preventing color mixture between subpixels.
2Illumination intensity
If the black matrix area is reduced to improve light transmittance, then light loss is reduced, but color isolation may be compromised
Solution Approach 1:
The patent applies dimensionality change by transitioning from a conventional orthogonal arrangement of signal lines and pixels to an inclined arrangement. The first and second sides of the pixel are inclined relative to the signal lines, creating a dimensional transformation that allows the black matrix to be positioned at optimized locations. This dimensional change enables reduced black matrix area while maintaining effective color isolation through strategic positioning rather than simply reducing size.
3Ease of manufacture
If pixels are arranged with conventional orientations, then manufacturing is simplified, but light transmittance and picture quality definition are reduced
Solution Approach 1:
The patent applies parameter changes by modifying the geometric parameters of the pixel arrangement. Specifically, the angles between the pixel sides and the signal lines are changed from conventional orthogonal relationships to inclined relationships. This parameter modification optimizes the black matrix positioning and reduces its area, thereby improving light transmittance and picture quality definition while maintaining manufacturability through systematic parameter adjustment rather than complex reconfiguration.
Data Source
AI summary
A transparent display device may improve transmittance and definition. The transparent display device includes a plurality of first signal lines extended in a first direction and disposed to be spaced apart from one another, a plurality of second signal lines extended in a second direction and disposed to be spaced apart from one another, a transmissive area provided between two first signal lines adjacent to each other and two second signal lines adjacent to each other, and a pixel including a plurality of subpixels disposed based on an overlapping area where the first signal line and the second signal line cross each other. At least one side oriented toward the transmissive area in each of the plurality of subpixels has an inclination with respect to each of the first signal line and the second signal line.