Array Substrate Polarity Control for Display Power Reduction
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Solution Overview
Problem
Dual gate drive architectures in display devices lead to increased power consumption due to constant switching between positive and negative polarity voltages, which raises production costs and energy usage.
Innovation Solution
An array substrate design where sub-pixels of the same color but opposite polarities in different sub-pixel groups are connected to the same scan line, allowing one source driver IC to control two columns of sub-pixels, and driving scan lines in odd rows before even rows (or vice versa) to minimize polarity reversals during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dual gate drive architecture is used to reduce the number of source driver ICs, then production cost is reduced, but power consumption increases due to constant polarity switching
Solution Approach 1:
The display panel is divided into odd rows and even rows, with each row type having a fixed polarity configuration. This segmentation allows the source driver IC to output voltages of the same polarity to multiple scan lines simultaneously, reducing the frequency of polarity switching while maintaining the dual gate drive architecture's cost benefits
Solution Approach 2:
The patent implements a periodic driving pattern where odd rows and even rows are driven alternately with fixed polarity assignments. This periodic action reduces the switching frequency of the source driver IC from every scan line to every other row, thereby reducing power consumption while maintaining the reduced number of driver ICs
2Adaptability or versatility
If sub-pixels of the same color with opposite polarities are connected to different scan lines, then display flexibility is improved, but the complexity of the driving circuit increases
Solution Approach 1:
The patent merges the driving of sub-pixels with opposite polarities by connecting them to the same scan line. This merging simplifies the driving circuit because the source driver IC can output the same polarity voltage to multiple scan lines simultaneously, reducing the complexity of polarity management while still supporting diverse display configurations
Data Source
AI summary
An array substrate, a display panel and a display device. The array substrate includes multiple pixel groups arranged in an array, each pixel group includes two sub pixel groups, each sub pixel group includes two pixels, and each pixel includes multiple sub-pixels. The sub-pixels in a same pixel group are located in a same row. Pixel groups in the same row are correspondingly connected to two adjacent scan lines, and pixel groups in different row are connected to different scan lines. In a same sub pixel group, sub-pixels having a same color and opposite polarities are connected to a same source driver IC, and are connected to different scan lines. In a same pixel group, sub-pixels having a same color and opposite polarities in different sub pixel groups are connected to the same scan line.