Display Panel Data Line Grouping for Terminal Reduction
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Solution Overview
Problem
High-resolution display panels with current control type light emitting elements face challenges in manufacturing due to the increased number of data lines and driver chip terminals, leading to precision alignment issues and higher costs.
Innovation Solution
A display device and method that divide data lines into column groups, using a current latch circuit to generate and supply gradation currents to display pixels, reducing the number of output terminals and simplifying the connection between the data driver and display panel substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of data lines is increased to achieve high resolution, then the display resolution is improved, but the number of driver chip terminals increases leading to precision alignment issues and higher manufacturing costs
Solution Approach 1:
The patent divides the data lines into multiple groups (e.g., first group DL1, second group DL2, third group DL3) and assigns each group to a separate terminal. This segmentation reduces the number of terminals required on the driver chip, thereby reducing alignment complexity and manufacturing difficulty while maintaining the ability to drive all data lines for high resolution display.
2Measurement precision
If the number of data lines is increased to achieve high resolution, then the display resolution is improved, but the manufacturing cost increases due to more terminals and alignment requirements
Solution Approach 1:
By segmenting data lines into groups that share common terminals, the patent reduces the total number of terminals on the driver chip. This reduction directly lowers manufacturing costs by simplifying the bonding process, reducing alignment requirements, and decreasing the complexity of the driver chip design while still supporting high resolution displays.
3Ease of operation
If individual terminals are provided for each data line, then the connection between driver and panel is straightforward, but the number of terminals and connection complexity increases significantly
Solution Approach 1:
The patent implements segmentation by grouping data lines (DL1-DL24 in groups of 8, for example) and assigning each group to a shared terminal. This approach maintains operational simplicity because each terminal still connects to a defined group of lines, while dramatically reducing the total terminal count from potentially dozens to a manageable number, thereby reducing connection complexity.
Data Source
AI summary
A display device includes a pixel array in which a plurality of display pixels are arranged in a two-dimensional manner which is divided into a plurality of column groups composed of the display pixels of a predetermined number of columns, a signal drive circuit which produces a signal current based on display data, and sequentially outputs, in time series via a common terminals, the signal current that corresponds to the display pixels for one row of the pixel array for each of signal currents that correspond to each of the column groups, and a current latch circuit which sequentially captures and holds the signal currents output from the signal drive circuit for one row of the pixel array, generates gradation currents and simultaneously supplies the gradation currents to the plurality of data lines, wherein the pixel array and the current latch circuit are formed on a display panel substrate.