Data Divider Circuit for Sequential Signal Charging in OLED Displays
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Solution Overview
Problem
Existing organic light emitting displays face challenges in improving display quality due to insufficient charging time of data signals, particularly when using demultiplexers that reduce the time data signals are supplied to each data line, leading to deteriorated performance.
Innovation Solution
The implementation of a data divider system that includes data dividers coupled to output lines, which temporally store and concurrently supply data signals to multiple data lines during a horizontal period, ensuring each data line receives signals for the full charging time, thereby improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If data signals are supplied to multiple data lines simultaneously using demultiplexers, then the display resolution and data line coverage are improved, but the charging time of data signals is reduced leading to deteriorated display quality
Solution Approach 1:
The patent divides the data signal supply process into sequential segments, where each data line receives data signals in dedicated time slots during the horizontal period rather than simultaneously. This segmentation allows each data line to receive signals for the full charging time while still covering multiple data lines, resolving the contradiction between coverage area and charging duration.
Solution Approach 2:
The patent implements preliminary action by sequentially preparing and supplying data signals to each data line before the next data line receives its signals. The data driver sequentially generates and supplies data signals to different data lines during the horizontal period, ensuring each signal has adequate charging time before being applied to the pixel, thus maintaining display quality while covering multiple data lines.
2Manufacturing precision
If data signals are sequentially supplied to each data line during one horizontal period, then the charging time is secured and display quality is improved, but the device complexity increases due to data dividers and control signal generators
Solution Approach 1:
The data driver performs multiple functions: it sequentially generates data signals for different data lines, supplies them during the horizontal period, and ensures proper charging time for each signal. By making the data driver multi-functional, the patent reduces the need for separate dedicated circuits for each function, thereby managing device complexity while maintaining improved display quality through sequential signal supply.
Solution Approach 2:
The patent introduces data dividers as intermediary components that receive data signals from the output line and distribute them to multiple data lines sequentially. These intermediaries manage the signal distribution and timing, allowing the system to achieve improved display quality through controlled sequential supply while keeping the overall architecture organized and manageable despite the increased complexity.
3Productivity
If multiple data signals are supplied to output lines in parallel, then the productivity and data transmission speed are improved, but the charging time for each data line is insufficient leading to performance deterioration
Solution Approach 1:
The patent employs periodic action by supplying data signals to different data lines in sequential time slots within each horizontal period. Instead of continuous parallel supply, the system uses periodic sequential supply where each data line receives signals at regular intervals, ensuring adequate charging time while maintaining overall productivity through the structured timing scheme across the display refresh cycle.
Data Source
AI summary
An organic light emitting display can improve display quality by securing a charging time of a data signal. An organic light emitting display includes pixels, a data driver, a plurality of data drivers, and a control signal generator. The pixels are respectively positioned at areas defined by scan lines and data lines. The data driver sequentially supplies i (i is a natural number greater than or equal to 2) data signals to each of output lines during one horizontal period. The plurality of data dividers are respectively coupled to the output lines, and supply the i data signals to i data lines. The control signal generator sequentially supplies i control signals to the data dividers, corresponding to the i data signals. In the organic light emitting display, the data dividers supply a corresponding data signal to each data line during the one horizontal period.