Reserve Sub-Pixel Stacking for High-Transmittance Displays
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Solution Overview
Problem
Existing display devices face challenges in achieving high transmittance rates and efficient repair of defective light-emitting elements, particularly in reducing the area occupied by reserve sub-pixels and maintaining high luminous efficiency.
Innovation Solution
A display device configuration that includes a substrate with pixel areas, each containing four types of sub-pixels and a reserve sub-pixel. The reserve sub-pixel stacks multiple light-emitting elements vertically to minimize its area, allowing for efficient repair of defective sub-pixels and maximizing the transmissive area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reserve sub-pixel is provided to repair defective light-emitting elements, then reliability is improved, but the area of the transmissive region is reduced
Solution Approach 1:
The patent applies vertical stacking of multiple light-emitting elements within the reserve sub-pixel across different layers. This three-dimensional arrangement allows the reserve sub-pixel to contain multiple functional elements (first, second, and third light-emitting elements for different color sub-pixels) without increasing its planar area, thereby preserving the transmissive region while providing comprehensive repair capability for defective elements.
2Adaptability or versatility
If multiple light-emitting elements are disposed in the reserve sub-pixel, then repair capability is improved, but the area of the reserve sub-pixel increases
Solution Approach 1:
The patent implements a nested structure where multiple light-emitting elements are positioned within the same reserve sub-pixel area across different vertical layers. The first light-emitting element is disposed in a first layer, the second light-emitting element in a second layer, and the third light-emitting element in a third layer, all within the boundaries of the single reserve sub-pixel. This nesting approach allows multiple functional elements to coexist in a compact space without expanding the reserve sub-pixel's planar footprint.
3Use of energy by moving object
If high-density drive current is supplied to improve luminous efficiency, then energy efficiency is improved, but the light-emitting element may be damaged
Solution Approach 1:
The patent modifies the electrical parameters by supplying high-density drive current to the light-emitting elements, particularly to the first light-emitting element. This parameter change enhances the luminous efficiency and brightness output of the elements. The invention manages the trade-off by designing the reserve sub-pixel structure to provide redundancy, so that if an element is damaged by the high current, repair can be performed using the vertically stacked elements within the same reserve sub-pixel.
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 proposed solution enhances the transmittance rate of the display device, allows for effective repair of multiple sub-pixels using a single reserve sub-pixel, and improves luminous efficiency by ensuring high-density drive current supply to light-emitting elements.
Implementation Method 1
a first light-emitting element of the first plurality of light-emitting elements, a second light-emitting element of the second plurality of light-emitting elements, and a third light-emitting element of the third plurality of light-emitting elements are on different layers in the reserve sub-pixel
Data Source
AI summary
A display device presented herein includes: a substrate having a plurality of pixel areas; a plurality of pixels in the plurality of pixel areas, each of the plurality of pixels including a first sub-pixel, a second sub-pixel, a third sub-pixel, and a reserve sub-pixel; a first plurality of light-emitting elements in the first sub-pixel and the reserve sub-pixel; a second plurality of light-emitting elements in the second sub-pixel and the reserve sub-pixel; and a third plurality of light-emitting elements in the third sub-pixel and the reserve sub-pixel; in which a first light-emitting element of the first plurality of light-emitting elements, a second light-emitting element of the second plurality of light-emitting elements, and a third light-emitting element of the third plurality of light-emitting elements are on different layers in the reserve sub-pixel.