Parallel Light-Emitting Pixel Layout for Low-Grayscale Luminance Control
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Solution Overview
Problem
Existing light-emitting display devices face challenges in precisely controlling luminance at low grayscales using high-efficiency light-emitting elements, leading to deteriorated image quality.
Innovation Solution
A display device design incorporating a first and a second light-emitting element connected in parallel, with different threshold voltages and sizes, allowing for precise luminance control at low grayscales while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a high-efficiency light-emitting element is used, then power consumption is reduced, but luminance control precision at low grayscales deteriorates
Solution Approach 1:
The light-emitting unit is segmented into multiple light-emitting elements (first, second, and third light-emitting elements) with different characteristics. The first light-emitting element has high luminous efficiency for power saving, the second has low threshold voltage for low grayscale control, and the third has high luminance for brightness enhancement. This segmentation allows each element to contribute to different aspects of performance, resolving the contradiction between power consumption and luminance control precision.
2Device complexity
If a single light-emitting element is used, then device complexity is reduced, but luminance control capability across different grayscales deteriorates
Solution Approach 1:
Each light-emitting element is assigned specific local qualities or characteristics: the first element has high luminous efficiency, the second has low threshold voltage, and the third has high luminance capability. By giving each component a specialized property suited to its function, the system achieves versatile luminance control across different grayscale ranges while maintaining reasonable structural complexity.
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 solution enables improved image quality and reduced power consumption by accurately controlling luminance across various grayscales, enhancing the display device's performance.
Implementation Method 1
a first light-emitting element connected between the first pixel electrode and the first common electrode, and a second light-emitting element connected in parallel with the first light-emitting element
Data Source
AI summary
A display device according to one or more embodiments includes a first pixel in a display area, and including a first pixel electrode, a first common electrode spaced apart from the first pixel electrode, a first light-emitting element connected between the first pixel electrode and the first common electrode, and a second light-emitting element connected in parallel with the first light-emitting element between the first pixel electrode and the first common electrode, and having a threshold voltage that is lower than a threshold voltage of the first light-emitting element.