Display Device Scan Line Sharing for Aperture Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices face challenges in increasing the aperture ratio of pixels and reducing manufacturing costs due to limited output terminals of integrated circuits and the need for multiple circuits to drive data lines, which also reduces the aperture ratio and increases costs.
Innovation Solution
A display device configuration where pixels in odd and even numbered columns share data lines and receive scan signals from distinct scan lines during different periods, allowing for overlapping data writing periods and improved signal transmission efficiency, along with emission control lines connecting multiple rows to transmit the same signal, optimizing the use of scan and emission control lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a data line is formed for each pixel and a driving device is formed in a limited display area, then each pixel can be driven independently, but the aperture ratio of the pixel decreases and manufacturing costs increase
Solution Approach 1:
The patent merges the driving functionality for multiple pixels into a single shared driving device located outside the display area. Specifically, one driving device controls multiple data lines that connect to multiple pixels, eliminating the need for separate driving devices within each pixel's display area. This consolidation maintains independent pixel driving capability while significantly increasing the aperture ratio by removing non-display elements from the pixel area.
2Productivity
If multiple integrated circuits are used to manufacture the data driver, then all data lines can be driven, but the device complexity and manufacturing costs increase
Solution Approach 1:
The patent implements a universal driving device that can control multiple data lines simultaneously using a single integrated circuit. The driving device generates scan signals that are applied to multiple scan lines, enabling one IC to perform the function previously requiring multiple ICs. This multi-functional approach maintains full data line driving capability while reducing device complexity and manufacturing costs.
3Ease of operation
If scan lines are provided for each pixel row, then data can be written to each row independently, but the number of scan lines increases and manufacturing costs increase
Solution Approach 1:
The patent employs periodic scanning where a single scan line is reused across multiple pixel rows in a time-division manner. The scan line alternates between different rows during different time periods, enabling independent data writing to each row without requiring separate physical scan lines for each row. This periodic reuse of scan lines reduces the total number of scan lines while maintaining independent row control capability.
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 the aperture ratio of pixels and decreases manufacturing costs by reducing the number of required scan and emission control lines, thereby improving display efficiency and reducing production expenses.
Implementation Method 1
a display device emits light of various colors by combinations of brightness of a pixel ('R') emitting red light, a pixel ('G') emitting green light, and a pixel ('B') emitting blue light
Data Source
AI summary
A display device is disclosed. In one aspect, the display device includes a first pixel disposed in an odd numbered pixel column and in a first pixel row, a second pixel disposed in an even numbered pixel column and in the first pixel row and a data line disposed between the odd and even numbered pixel columns and configured to apply a plurality of data voltages to the first and second pixels. The display device also includes a first odd number scan line configured to transmit a first odd number scan signal to the first pixel during a first data writing period, a first even number scan line configured to transmit a first even number scan signal to the second pixel during a second data writing period, and a second scan line configured to transmit a second scan signal to the first and second pixels during an initialization period.