Display Pixels With Series Emitters and Dual Reference Voltages
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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, where each pixel includes sub-pixels with varying numbers and configurations of light emitting units connected in series and series-connected light conversion layers, operated at different reference voltages to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of light emitting units in each sub-pixel is increased to achieve high brightness, then the brightness is improved, but the power consumption increases
Solution Approach 1:
The patent applies local quality by assigning different numbers of light emitting units to different sub-pixels (first sub-pixel has at least two, second sub-pixel has at least one) and connecting them to different reference voltages. This creates localized variations in electrical characteristics that optimize power consumption for each sub-pixel's specific luminous requirements, rather than uniformly increasing power consumption across all sub-pixels to achieve high brightness.
Solution Approach 2:
The patent changes electrical parameters by connecting light emitting units to different reference voltages (first reference voltage for first sub-pixel, second reference voltage for second sub-pixel). This parameter variation allows precise control over the operating point of each sub-pixel, enabling high brightness output while optimizing power consumption by matching electrical characteristics to luminous requirements.
2Use of energy by moving object
If different numbers of light emitting units are used in different sub-pixels, then power efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent segments the pixel array into different sub-pixel types (first sub-pixels and second sub-pixels) with distinct configurations. Each segment is optimized independently with appropriate numbers of light emitting units and reference voltage connections, allowing power efficiency optimization without requiring complex individual control of every single light emitting unit, thus managing device complexity through systematic segmentation.
Solution Approach 2:
The patent implements universality by creating standardized sub-pixel configurations that can be repeatedly applied across the display device. The first sub-pixel configuration (with at least two light emitting units) and second sub-pixel configuration (with at least one light emitting unit) serve as universal building blocks, simplifying manufacturing and design while achieving overall power efficiency through their differentiated but standardized arrangements.
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 across sub-pixels, thereby improving luminous performance.
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
AI summary
A display device is provided. The display device includes a circuit substrate and a plurality of pixels. The plurality of pixels are disposed on the circuit substrate, and electrically connected to the circuit substrate. Each of the plurality of pixels includes a first sub-pixel and a second sub-pixel. The first sub-pixel includes at least two first light emitting units connected in series. The second sub-pixel includes at least one second light emitting unit. The number of the at least two first light emitting units of the first sub-pixel is greater than the number of the at least one second light emitting unit of the second sub-pixel. The at least two first light emitting units are electrically connected to a first reference voltage. The at least one second light emitting unit is electrically connected to a second reference voltage. The first reference voltage is different from the second reference voltage.