Display Pixel Segmentation with Series LEDs for Power Efficiency
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Solution Overview
Problem
Improving power efficiency is a critical issue in LED displays to achieve high-brightness display effects.
Innovation Solution
The display device incorporates a circuit substrate with pixels, each comprising sub-pixels with varying numbers and configurations of light emitting units and reference voltages, including series connections and light conversion layers to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of light emitting units is increased to achieve high brightness, then the brightness is improved, but the power consumption increases
Solution Approach 1:
The pixel is divided into multiple sub-pixels (first sub-pixel with multiple first light emitting units, second sub-pixel with second light emitting units). Each sub-pixel can be independently controlled with different reference voltages, allowing selective activation and optimized power distribution across segments to achieve high brightness while managing power consumption.
Solution Approach 2:
Different sub-pixels are assigned different reference voltages (first reference voltage for first sub-pixel, second reference voltage for second sub-pixel) based on their specific light emitting unit configurations. This localized optimization allows each sub-pixel to operate at its most efficient voltage level, reducing overall power consumption while maintaining required brightness levels.
2Illumination intensity
If more light emitting units are used to increase brightness output, then the illumination intensity is improved, but the device complexity increases
Solution Approach 1:
The pixel structure is segmented into first sub-pixel and second sub-pixel groups, each with their own reference voltage connections. This segmentation organizes the multiple light emitting units into manageable groups, reducing the complexity of controlling each individual unit while achieving high overall brightness.
Solution Approach 2:
The light conversion layer serves multiple functions: it converts light from the light emitting units to the desired wavelength for color accuracy, and it also helps in optimizing the overall light output efficiency. This multi-functionality reduces the need for additional separate components, thereby managing device 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
This configuration enhances power efficiency and driving efficiency by reducing power consumption while maintaining high brightness through optimized sub-pixel designs.
Implementation Method 1
The first light conversion layer is configured to convert light with a first wavelength to light with a second wavelength
Data Source
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AI summary
The display device (100) includes a circuit substrate (101) and a plurality of pixels (P(1,1)~P(R,S)). The plurality of pixels (P(1,1)~P(R,S)) is electrically connected to the circuit substrate (101). Each of the plurality of pixels (P(1,1)~P(R,S)) includes a first sub-pixel (PR) and a second sub-pixel (PG). The first sub-pixel (PR) includes at least two first light emitting units (RD_1, RD_2) connected in series. The second sub-pixel (PG) includes at least one second light emitting unit (GD). The number of the at least two first light emitting units (RD_1, RD_2) of the first sub-pixel (PR) is greater than the number of the at least one second light emitting unit (GD) of the second sub-pixel (PG). The at least two first light emitting units (RD_1, RD_2) are electrically connected to a first reference voltage (PVSS2). The at least one second light emitting unit (GD) is electrically connected to a second reference voltage (PVSS).