Stacked Subpixel Display Panel for High Luminance and Transmittance
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Solution Overview
Problem
Current display technologies face challenges in achieving high luminance and extended lifespan of light emitting elements while operating at low current density, and in maintaining transmittance and resolution for transparent display devices.
Innovation Solution
The design incorporates a display panel structure with wide light emitting areas in transparent regions, subpixel pairs emitting complementary colors, and electrical connections that simplify manufacturing and reduce opaque signal lines, allowing for improved transmittance and luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If light emitting areas are increased in area to achieve high luminance under low current density, then lifespan of light emitting elements is extended, but the area available for transmissive regions is reduced
Solution Approach 1:
The patent transitions from a planar arrangement of subpixels to a three-dimensional stacked configuration where subpixels are arranged vertically in multiple layers. This dimensional change allows light emitting areas to be increased for high luminance while maintaining transmissive areas by utilizing the vertical space, thus resolving the contradiction between extending element lifespan and preserving transmissive area.
Solution Approach 2:
The display panel is segmented into multiple stacked layers, with different subpixel types (e.g., first color subpixels, second color subpixels, third color subpixels) arranged in separate layers. This segmentation allows each layer to be optimized independently, enabling increased light emitting area in non-transmissive regions while preserving transmissive areas, thereby extending element lifespan without sacrificing transmissive area.
2Manufacturing precision
If subpixel pairs with complementary colors are used to maintain resolution and enable achromatic color expression, then color accuracy is improved, but the complexity of electrical connections and manufacturing increases
Solution Approach 1:
The patent merges subpixels of different colors (first color, second color, third color) into stacked pairs or groups where complementary color subpixels are vertically aligned. This merging approach maintains color accuracy through precise spatial relationship while simplifying electrical connections by sharing common signal lines (e.g., first data line, second data line, third data line) among stacked subpixels, thereby reducing overall connection complexity.
Solution Approach 2:
The stacked subpixel structure enables universal use of common electrical connections for multiple subpixels. For example, multiple subpixels in a stack can share data lines and control signals, allowing a single signal line to serve multiple functions and control multiple color subpixels, thus reducing electrical connection complexity while maintaining color accuracy.
3Illumination intensity
If transmissive areas are increased to improve transmittance and facilitate viewing from the front, then transparency is improved, but the area for light emitting elements is reduced
Solution Approach 1:
The patent resolves this contradiction by moving light emitting elements into the vertical dimension through stacked layers. Transmissive areas are maintained in the horizontal plane for improved transparency and front viewing, while light emitting areas are expanded vertically in non-transmissive regions, allowing both high transmittance and sufficient light emitting area to coexist.
Solution Approach 2:
The display panel is segmented into transmissive regions and non-transmissive regions, with light emitting elements concentrated in the non-transmissive regions arranged in stacked configurations. This segmentation allows transmissive areas to be maximized for high transmittance while light emitting areas are efficiently packed in vertical stacks in non-transmissive areas, resolving the area allocation contradiction.
4Measurement precision
If multiple signal lines are used to connect subpixels individually, then control precision is improved, but the opaque area occupied by signal lines increases
Solution Approach 1:
The patent merges the electrical connection paths of stacked subpixels by implementing shared signal lines. Multiple subpixels in a vertical stack are connected to common data lines (first data line, second data line, third data line) and control lines, reducing the number of separate signal lines needed. This merging maintains control precision through selective activation while significantly reducing the opaque area occupied by signal lines.
Solution Approach 2:
Signal lines are designed with universal functionality to serve multiple subpixels simultaneously. A single data line can control multiple subpixels of different colors in a stack, and control signals are multiplexed to achieve precise control. This multi-functional approach reduces the total signal line count and minimizes opaque areas while preserving control precision.
Data Source
AI summary
The present disclosure provides a display device that includes a transmissive area, and a non-transmissive area disposed on at least one side of the transmissive area, and including a first subpixel pair, a second subpixel pair, and a third subpixel pair. Each of the first subpixel pair, the second subpixel pair, and the third subpixel pair may include two or more subpixels having a complementary color relationship, and data voltages may be supplied to the subpixels having the complementary color relationship at a same scan timing, thereby, enabling operation with low power.