Pixel Electrode Layout With Series-Parallel LEDs for Higher Luminance
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Solution Overview
Problem
Current display devices face inefficiencies in light emission due to limitations in the design and connection of light emitting elements, which affect overall luminance and power efficiency.
Innovation Solution
The display device incorporates a series-parallel mixed or hybrid structure for light emitting elements, where first and second light emitting elements are connected in parallel between pixel and connection electrodes, with direct electrical connections and insulating layers, enhancing light emission efficiency and reducing dark spot failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If light emitting elements are connected in series-parallel hybrid structure, then light emission efficiency is improved, but device complexity increases
Solution Approach 1:
The light emitting element array is segmented into multiple independent light emitting elements that can be connected in series-parallel hybrid configurations. Each light emitting element is divided as an independent functional unit with its own electrodes and semiconductor layers, allowing flexible connection arrangements that optimize both efficiency and complexity management.
Solution Approach 2:
The connection electrodes are designed to serve multiple functions: they electrically connect light emitting elements in series-parallel configurations, provide mechanical support, and enable flexible arrangement patterns. This multi-functionality reduces the need for additional specialized components, thereby managing device complexity while achieving improved light emission efficiency.
2Use of energy by moving object
If driving current is reduced to improve power efficiency, then energy consumption decreases, but luminance output may be insufficient
Solution Approach 1:
The patent changes the electrical connection parameters by implementing series-parallel hybrid configurations instead of traditional single-series or single-parallel arrangements. This parameter change allows the system to achieve higher luminance output at reduced driving currents by optimizing the current distribution across multiple light emitting elements, thereby improving power efficiency without sacrificing luminance.
Solution Approach 2:
The patent employs composite connection structures combining series and parallel configurations. This composite arrangement allows different portions of the light emitting element array to operate at different current levels, enabling the system to achieve high overall luminance while maintaining reduced power consumption through optimized current distribution.
3Illumination intensity
If more light emitting elements are connected in parallel to increase luminance, then brightness increases, but dark spot failures become more likely
Solution Approach 1:
By segmenting the light emitting element array into multiple independently connected units with series-parallel hybrid configuration, the patent reduces the probability that a single failure will cause a visible dark spot. The segmentation allows failed elements to be isolated while other segments continue to function, thereby maintaining reliability while achieving high luminance.
Solution Approach 2:
The series-parallel hybrid connection structure provides beforehand cushioning against failures by creating redundant current paths. If one light emitting element fails, the series-parallel configuration allows current to bypass through alternative paths, preventing dark spot formation and maintaining overall system reliability while sustaining high luminance output.
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 improves light emission efficiency and reduces the likelihood of dark spot failures by allowing series-parallel connections of light emitting elements, achieving higher luminance with lower driving current while maintaining reliability.
Implementation Method 1
a plurality of first light emitting elements disposed between the first pixel electrode and the first connection electrode; and a plurality of second light emitting elements disposed between the second connection electrode and the second pixel electrode
Data Source
AI summary
A display device includes pixels each of which includes a first pixel electrode; a first connection electrode disposed on the first pixel electrode; a second connection electrode spaced apart from the first pixel electrode; a second pixel electrode disposed on the second connection electrode; first light emitting elements disposed between the first pixel electrode and the first connection electrode; and second light emitting elements disposed between the second connection electrode and the second pixel electrode. The first connection electrode is electrically connected to the second connection electrode.