Display Sub-Pixel Circuit Sharing to Reduce Data-Driver Heat
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Solution Overview
Problem
Display devices face challenges in reducing power consumption and heat generation in data drivers, particularly in scenarios where still images or videos are displayed, due to the high number of transistors and frequent data signal changes.
Innovation Solution
The display device employs a configuration where sub-pixel circuits in alternate columns share common output lines, reducing the number of output lines and transistors, and alternates data signal application periods to minimize power consumption and heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each sub-pixel circuit is connected to separate output lines, then data signal transmission is reliable, but the number of output lines and transistors increases, leading to high power consumption and heat generation
Solution Approach 1:
The patent merges output lines by connecting multiple sub-pixel circuits (specifically, sub-pixel circuits in the same column) to a common output line. This reduces the total number of output lines from the data driver, thereby reducing the number of transistors required and lowering power consumption and heat generation while maintaining reliable data signal transmission to all connected sub-pixel circuits.
Solution Approach 2:
Each common output line serves multiple sub-pixel circuits simultaneously, making the output line universal. This multi-functionality allows a single output line to transmit data signals to multiple sub-pixel circuits, reducing the overall number of output lines needed and decreasing the transistor count and power consumption in the data driver.
2Manufacturing precision
If data signals are frequently updated, then image quality is improved, but power consumption and heat generation in the data driver increase
Solution Approach 1:
By merging multiple data signal transmission paths into fewer common output lines, the patent reduces the total number of transistors in the data driver. This consolidation maintains the ability to transmit updated data signals for high image quality while reducing the overall power consumption and heat generation associated with driving all those transistors.
3Productivity
If the number of transistors in the data driver is increased, then data signal transmission capability is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent combines multiple data signal transmission functions into fewer common output lines, each served by fewer transistors. This merging approach maintains comprehensive data signal transmission capability to all sub-pixel circuits while reducing the total transistor count and simplifying the data driver structure, thereby lowering device complexity.
4Reliability
If separate output lines are used for each sub-pixel circuit, then data signal transmission is reliable, but heat generation in the data driver increases
Solution Approach 1:
The patent merges multiple separate output lines into fewer common output lines that serve multiple sub-pixel circuits. This reduction in the number of output lines and associated transistors directly decreases heat generation in the data driver while maintaining reliable data signal transmission to all connected sub-pixel circuits through the shared lines.
Data Source
AI summary
A display device includes sub-pixel circuits disposed in a plurality of rows and a plurality of columns, light emitting elements are respectively connected to the sub-pixel circuits, output lines configured to carry a data signal to the sub-pixel circuits, and first scan lines and second scan lines configured to carry a scan signal to the sub-pixel circuits, wherein each of the output lines is commonly connected to sub-pixel circuits, among the sub-pixel circuits, disposed in different columns among the columns, each of the first scan lines is connected to first sub-pixel circuits of a corresponding row among the sub-pixel circuits, and each of the second scan lines is connected to second sub-pixel circuits of a corresponding row among the sub-pixel circuits, wherein the first sub-pixel circuits and the second sub-pixel circuits are alternately disposed in the corresponding row.