Display Substrate With Segmented Operating Voltage Transmission Lines
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Solution Overview
Problem
In display apparatuses using electroluminescent elements like OLEDs and QLEDs, providing a single operating voltage for all light-emitting elements leads to increased heat generation and power consumption, particularly for elements requiring lower driving voltages, as the voltage is set according to the highest required voltage, resulting in inefficient energy use.
Innovation Solution
A display substrate with a configuration of sub-pixels in each pixel unit, where each sub-pixel has a dedicated operating voltage transmission line, allowing for different operating voltages to be applied to each sub-pixel, ensuring that each light-emitting element receives the minimum necessary voltage, thereby optimizing energy use and reducing heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single operating voltage is provided for all light-emitting elements, then the display apparatus can be operated with a unified voltage system, but heat generation and power consumption increase for light-emitting elements that require lower driving voltages
Solution Approach 1:
The patent divides the unified voltage system into multiple segmented voltage lines (first operating voltage transmission line and second operating voltage transmission line) that transmit different operating voltages to different sub-pixels. This segmentation allows each light-emitting element to receive the appropriate voltage level, reducing energy loss while maintaining system functionality.
Solution Approach 2:
The patent applies local quality by providing different operating voltages to different regions (sub-pixels) based on their specific requirements. Red sub-pixels receive a first operating voltage while green and blue sub-pixels receive a second operating voltage, ensuring each region operates with the optimal voltage level and minimizing overall energy consumption.
2Device complexity
If a single operating voltage is provided for all light-emitting elements, then the voltage transmission line configuration is simplified, but heat generation increases for light-emitting elements that require lower driving voltages
Solution Approach 1:
The patent segments the transmission line configuration into multiple independent voltage transmission lines, each carrying a specific operating voltage level. This segmentation prevents excessive voltage from being applied to all elements, thereby reducing heat generation in voltage-sensitive light-emitting elements while maintaining a manageable line configuration.
Solution Approach 2:
The patent implements local quality by tailoring the voltage supplied to each sub-pixel group according to their specific thermal and electrical characteristics. This localized voltage optimization reduces unnecessary heat generation in green and blue sub-pixels that are more sensitive to voltage-induced heating.
3Loss of energy
If different operating voltages are applied to different sub-pixels, then power consumption is reduced, but the transmission line configuration becomes more complex
Solution Approach 1:
The patent merges the functionality of multiple voltage transmission requirements into a coordinated system where different operating voltage transmission lines work together with the existing data lines and pixel driving circuits. This merging approach achieves reduced power consumption while integrating the complex voltage configuration into the existing display structure.
Solution Approach 2:
The patent utilizes parameter changes by varying the operating voltage levels transmitted to different sub-pixel groups based on their specific electrical characteristics. This parameter optimization reduces power consumption while the transmission line configuration is designed to accommodate these voltage variations efficiently.
Data Source
AI summary
A display substrate includes: a base, and pixel units arranged in an array, each pixel unit including at least two sub-pixels each including: a pixel driving circuit, and a light-emitting element. The light-emitting element includes: a first electrode, a light-emitting layer, and a second electrode arranged on the base sequentially. Each sub-pixel is configured with a corresponding operating voltage transmission line. The pixel driving circuit includes: a driving transistor with a first pole electrically connected to the operating voltage transmission line. Each pixel unit includes two first sub-pixels, one second sub-pixel, and one third sub-pixel. The first operating voltage transmission line is configured to transmit a first operating voltage to both the two first sub-pixels and the one third sub-pixel, the second operating voltage transmission line is configured to transmit a second operating voltage, which is different from the first operating voltage, to the one second sub-pixel.