AMOLED Driving Method Using Segmented Blue Sub-Pixels
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Solution Overview
Problem
The low luminous efficiency of blue materials in existing AMOLED display panels leads to increased power consumption and reduced lifespan, as the driver TFT must supply high driving currents to achieve sufficient light emission.
Innovation Solution
A method is introduced using a cyan material with four times the luminous efficiency of conventional blue materials, where a single pixel incorporates red, green, light blue, and dark blue sub-pixels, with only one blue sub-pixel enabled at a time, determined by a 3D color signal, to optimize driving signals and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional blue material (B2) is used in AMOLED display panels, then the display can achieve sufficient light emission, but the luminous efficiency is low and power consumption increases
Solution Approach 1:
The blue color is segmented into two different blue materials (cyan material B1 and conventional blue material B2) with different luminous efficiencies. By dividing the blue sub-pixel into multiple materials with complementary characteristics, the system can select the optimal material for different color regions, thereby improving overall luminous efficiency and reducing power consumption.
Solution Approach 2:
The invention changes the material parameter by introducing cyan material B1 with higher luminous efficiency than conventional blue material B2. By adjusting the material composition parameter and selecting different materials based on the required color output, the system achieves higher luminous efficiency while maintaining sufficient light emission.
2Illumination intensity
If driver TFT supplies large driving current to achieve sufficient light emission, then the display brightness is adequate, but the lifetime of blue material is shortened
Solution Approach 1:
By segmenting the blue sub-pixel into two materials (B1 and B2) with different efficiency characteristics, the system can use the highly efficient cyan material B1 for regions requiring high luminous efficiency, thereby reducing the driving current required and extending the lifetime of the blue materials.
Solution Approach 2:
The invention effectively uses the cyan material B1 which has higher luminous efficiency, allowing the system to achieve the required brightness with lower current. This reduces the stress and degradation rate on the blue materials, thereby extending their operational lifetime.
3Illumination intensity
If driver TFT supplies large driving current to achieve sufficient light emission, then the display brightness is adequate, but the efficiency of AMOLED display degrades
Solution Approach 1:
The blue sub-pixel is segmented into two materials with different luminous efficiencies. By strategically using the high-efficiency cyan material B1, the system improves overall display efficiency while maintaining adequate brightness output.
Solution Approach 2:
The invention changes the material efficiency parameter by introducing cyan material B1 with at least four times the luminous efficiency of conventional blue material B2. This parameter change directly improves display efficiency while maintaining the required brightness level.
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 enhances luminous efficiency and reduces power consumption by selectively enabling sub-pixels based on the 3D color signal, improving the overall performance of the AMOLED display.
Implementation Method 1
the cyan material (B1) which offers a luminous efficiency at least four times of that of a conventional blue material (B2)
Data Source
AI summary
A method for driving an active matrix organic light emitting diode (AMOLED) display panel is provided. In the present method, how to drive a single pixel having a red sub-pixel, a green sub-pixel, a first blue (light blue) sub-pixel, and a second blue (dark blue) sub-pixel is effectively determined based on the characteristics of the (1931) CIE color space. Besides, at the same time point, only one of the two sub-pixels corresponding to the two blues (i.e. dark blue and light blue) in the single pixel is enabled to be mixed with the red sub-pixel and the green sub-pixel. Accordingly, the luminous efficiency of the AMOLED is improved and the power consumption of the entire AMOLED display is reduced.