Color Subpixel Emission Control for Uniform Display Luminance
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Solution Overview
Problem
Existing display devices face challenges in efficiently managing power consumption and maintaining uniform light emission luminance across subpixels, particularly in light emitting display devices with varying light emitting elements.
Innovation Solution
A display device design that includes subpixels with different light emitting elements emitting different colors, each driven by distinct data and emission control signals, with varying driving currents and emission periods tailored to their efficiency ranges, ensuring synchronized light emission and improved power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If different driving currents are applied to subpixels with different light emitting elements, then power efficiency is improved, but device complexity increases due to separate emission control
Solution Approach 1:
The patent changes the emission control parameter from a unified approach to a differentiated approach, where each subpixel type (red, green, blue) has its own emission control line and emission period settings. This allows optimization of driving currents and emission durations for each color's light emitting element characteristics, reducing overall power consumption while accepting increased control complexity
Solution Approach 2:
The emission control function is segmented into separate control lines for different subpixel types. The display device divides the pixel array into first, second, and third pixel arrays corresponding to different light emitting elements, with each having independent emission control. This segmentation enables tailored power management for each subpixel type
2Illumination intensity
If emission periods are optimized for each subpixel type, then light emission luminance uniformity is improved, but control signal complexity increases
Solution Approach 1:
The patent applies local quality by setting different emission periods for different subpixel types based on their specific light emitting element characteristics. Each subpixel type (red, green, blue) receives customized emission control parameters optimized for its luminance requirements, achieving uniform overall display luminance while requiring complex differentiated control signals
3Manufacturing precision
If separate data lines are used for each subpixel type, then driving precision is improved, but device complexity increases
Solution Approach 1:
The data transmission system is segmented into separate data lines for different subpixel types. First data lines connect to first subpixels, second data lines to second subpixels, and third data lines to third subpixels. This segmentation enables precise independent control of each subpixel type while increasing the overall data line 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 maintains uniform light emission luminance while enhancing power efficiency by optimizing driving currents and emission periods for each subpixel, thereby improving display quality and reducing overall power consumption.
Implementation Method 1
a first light emitting element, a second light emitting element, and a third light emitting element, each configured to emit light of different colors
Data Source
AI summary
A device includes a first subpixel connected to a first data line and a first emission control line, and including a first light emitting element, a second subpixel connected to a second data line and a second emission control line and including a second light emitting element, a third subpixel connected to a third data line and a third emission control line and including a third light emitting element, a data driver configured to output data voltages of the first subpixel, the second subpixel, and the third subpixel to the first data line, the second data line, and the third data line, respectively, and a scan driver configured to output a first emission control signal of a first width, a second emission control signal of a second width, and a third emission control signal of a third width to the first, second, and the third emission control lines, respectively.