Array Substrate Shared Scanning Lines Resolution
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Solution Overview
Problem
The manufacturing of high-resolution display devices using Active Matrix Organic Light Emitting Diode (AMOLED) panels is hindered by the complexity of pixel arrangement and high manufacturing costs, particularly due to the need for numerous signal lines for sub-pixels emitting different colors.
Innovation Solution
An array substrate design where each pixel unit includes three sub-pixels (red, green, and blue) with shared scanning lines and a single data line per column, reducing the number of signal lines and improving routing efficiency, and utilizing integral cathodes for organic electroluminescence devices to simplify manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If each sub-pixel is provided with separate data lines and scanning lines, then the control precision of sub-pixels is improved, but the device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent merges the data lines for red, green, and blue sub-pixels into a single shared data line. The pixel circuit includes a demultiplexer that receives a single data signal and distributes it to different sub-pixels based on control signals, thereby reducing the number of data lines from three to one while maintaining independent control capability
Solution Approach 2:
The single data line serves multiple functions by transmitting data signals to different sub-pixels at different time slots. The scanning lines are also designed to serve multiple purposes: they control both the switching transistors and sensing transistors of sub-pixels, reducing the overall number of signal lines required
2Manufacturing precision
If separate data lines are provided for each sub-pixel column, then the data transmission accuracy is improved, but the area occupied by signal lines increases
Solution Approach 1:
The patent combines three separate data lines into one shared data line that serves all sub-pixels in a column. Time-division multiplexing is used to transmit data for red, green, and blue sub-pixels sequentially over the single data line, significantly reducing the area occupied by signal lines while maintaining data transmission accuracy through proper signal timing and control
3Manufacturing precision
If more scanning lines are used to control each row of pixel units, then the control precision of pixel units is improved, but the device complexity increases
Solution Approach 1:
The scanning lines are designed with multi-functionality to control both switching transistors and sensing transistors. By carefully timing the activation of these transistors through the same scanning lines, the patent achieves precise control of pixel units without increasing the number of scanning lines
Solution Approach 2:
The patent employs periodic scanning where scanning lines activate different transistors in different time periods. This periodic action allows the same scanning lines to control multiple functions sequentially, maintaining control precision while reducing the number of required scanning lines
Data Source
AI summary
An array substrate, a display panel and a display device are provided. The array substrate includes a plurality of pixel units arranged in an array, each pixel unit includes a first sub-pixel, a second sub-pixel and a third sub-pixel, and each of the first, second and third sub-pixels includes a pixel circuit including a switching transistor, a driving transistor, a sensing transistor, a storage capacitor and a light-emitting device. The first sub-pixels, the second sub-pixels and the third sub-pixels included in each row of the array are controlled by four scanning lines, and at least one of the four scanning lines is shared by the row of the array and another row of the array adjacent to the row of the array. Each column of pixel units of the array are coupled to a same data line.