Sequential Subpixel Emission for Display Luminance Stability
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Solution Overview
Problem
Display devices experience a decrease in luminance due to signal interference, which affects the performance of light-emitting pixels.
Innovation Solution
The display device incorporates a pixel structure with three subpixels that emit light during different emission periods, each with a distinct on-duty ratio, using separate emission control lines and data lines, and a scan driver that outputs emission control signals sequentially to manage these periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If subpixels emit light simultaneously, then the pixel can display images, but signal interference causes luminance decrease
Solution Approach 1:
The patent applies periodic action by dividing the emission period into multiple sub-periods, where each subpixel emits light in a sequential manner rather than simultaneously. The first subpixel emits during a first emission period, the second subpixel during a second emission period, and the third subpixel during a third emission period, with these periods being temporally separated or partially overlapping. This periodic emission pattern reduces signal interference while maintaining overall luminance output.
Solution Approach 2:
The patent segments the emission control by providing separate emission control lines for each subpixel (first emission control line, second emission control line, third emission control line) and using a scan driver to sequentially output emission control signals to each subpixel. This segmentation allows independent control of each subpixel's emission timing, preventing signal interference while maintaining pixel functionality.
2Illumination intensity
If emission control signals are output sequentially, then signal interference is reduced, but emission control complexity increases
Solution Approach 1:
The scan driver serves multiple functions: it outputs emission control signals to multiple subpixels (first, second, and third subpixels) sequentially, manages the timing of emission periods, and coordinates the overall emission control for the pixel. This multi-functional approach reduces the need for separate dedicated control circuits for each subpixel, thereby managing complexity while achieving luminance stability.
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 approach prevents or reduces luminance decrease by minimizing signal interference, thereby maintaining consistent pixel performance.
Implementation Method 1
A light-emitting display device includes pixels including light-emitting elements
Data Source
AI summary
A display device includes a pixel that includes a first subpixel, a second subpixel, and a third subpixel respectively configured to emit light in response to a first driving current, a second driving current, and a third driving current during different first, second, and third emission periods.