OLED Display Panel Time-Sharing Sub-Pixel Driving Circuit
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Solution Overview
Problem
Current OLED display technology faces high display driving power consumption, which is a significant disadvantage in electronic devices with display functions.
Innovation Solution
A display panel design featuring multiple pixel units arranged in an array with sub-pixels connected to OLED driving circuits in a time-sharing manner, where sub-pixels in alternate rows share OLED driving circuits, allowing for reduced power consumption by scanning and lighting only a portion of sub-pixels at a time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If all sub-pixels are connected to dedicated OLED driving circuits and scanned simultaneously, then display quality is maintained, but power consumption increases
Solution Approach 1:
The display panel divides sub-pixels into multiple groups (first group, second group, third group) that are scanned alternately at different time periods. This segmentation allows only a portion of sub-pixels to be actively driven at any given moment, reducing instantaneous power consumption while maintaining overall display functionality through time-division multiplexing.
Solution Approach 2:
The patent implements periodic scanning where odd rows and even rows are alternately scanned in different time periods. During odd time periods, odd rows are scanned while even rows remain inactive, and vice versa during even time periods. This periodic action reduces power consumption by ensuring that not all OLED driving circuits operate simultaneously, while the alternating pattern maintains perceived display refresh rate.
2Duration of action of stationary object
If all sub-pixels are illuminated continuously, then display brightness is maintained, but sub-pixel service life decreases
Solution Approach 1:
Sub-pixels are segmented into multiple groups that are illuminated alternately rather than continuously. The first, second, and third groups of sub-pixels are activated in different time periods, which distributes the operational stress over time and reduces cumulative degradation from continuous illumination, thereby extending service life while maintaining perceived brightness through temporal multiplexing.
Solution Approach 2:
The illumination of sub-pixels follows a periodic pattern where different groups are activated in alternating time periods. This periodic illumination reduces the cumulative stress on individual sub-pixels compared to continuous operation, extending their service life while the alternating activation maintains overall display brightness through time-division multiplexing.
Data Source
AI summary
A display panel includes: pixel units, where each pixel unit includes sub-pixels in a row direction; gate lines and data lines crossed to define sub-pixel regions, each sub-pixel region includes one sub-pixel and an organic light emitting diode (OLED) driving circuit, OLED driving circuits in a same column are connected with one data line, OLED driving circuits in a same row are connected with one gate line; and at least two sub-pixel regions adjacent in a column direction being a first region and a second region respectively, and in the first and second regions in a same group, the sub-pixel in the first region is connected with the OLED driving circuit in the second region, and the sub-pixel in the second region is connected with the OLED driving circuit in the first region.