Data Distributor for Organic Light Emitting Display Devices
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Solution Overview
Problem
The existing organic light emitting display devices face challenges in developing a driving integrated circuit (IC) due to an increased number of output lines and design space requirements, which complicates the arrangement of output lines and results in a larger non-display region.
Innovation Solution
The implementation of a data distributor between the data driver and data lines, along with a specific pixel arrangement structure where first and second sub-pixels are alternately arranged in one column, and third sub-pixels are arranged in an adjacent column, reducing the number of output lines and enabling a checkerboard pattern for improved resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional data lines are utilized and the data driver is directly connected to those data lines, then the data driver can supply data signals to all data lines, but the number of output lines of the data driver is increased
Solution Approach 1:
A data distributor is introduced as an intermediary component between the data driver and the data lines. The data distributor receives data signals from a reduced number of output lines of the data driver and distributes them to multiple data lines, thereby reducing the number of output lines required while maintaining full data signal distribution capability.
Solution Approach 2:
The data distribution function is segmented into two stages: first, the data driver generates data signals on a reduced number of output lines; second, the data distributor segments and redirects these signals to the appropriate data lines based on pixel column arrangements. This segmentation allows the data driver to have fewer output lines while still serving all data lines.
2Reliability
If additional data lines are utilized and the data driver is directly connected to those data lines, then complete data signal coverage is achieved, but the design space necessary for the arrangement of output lines of the driving IC is increased
Solution Approach 1:
The data distributor acts as a mediator that consolidates the data signal paths. Instead of requiring separate direct connections from the data driver to each data line (which would increase design space), the data distributor receives signals from fewer output lines and redistributes them, thereby reducing the design space required in the driving IC while maintaining complete data signal coverage.
3Manufacturing precision
If first and second sub-pixels for emitting light of different colors in one column are alternately arranged, then high resolution is realized, but the number of output lines of the data driver is increased
Solution Approach 1:
The display pixels are segmented into different column groups (first column group with first and second sub-pixels alternately arranged, second column group with third sub-pixels arranged). The data distributor selectively connects data lines to different column groups, allowing high-resolution display through alternate arrangement while managing output line complexity through structured distribution.
Solution Approach 2:
Different column groups have different data line connection characteristics. The first column group (with alternating first and second sub-pixels) is connected through first data lines, while the second column group (with third sub-pixels) is connected through second data lines. This local differentiation allows optimized data distribution that maintains high resolution while controlling the number of output lines.
Data Source
AI summary
An organic light emitting display device includes a display region including first sub-pixels, second sub-pixels and third sub-pixels at crossing regions of scan lines and data lines and arranged in a repeating pattern, the first, second and third sub-pixels for emitting light of different colors, a scan driver for supplying scan signals to the scan lines; a data driver for supplying data signals to the data lines; and a data distributor between the data driver and the data lines for distributing the data signals from output lines of the data driver to the data lines. Ones of the first and second sub-pixels are alternately arranged in a first column, and ones of the third sub-pixels are arranged in a second column adjacent to the first column.