Honeycomb Pixel Structure for Simplified OLED Driving Circuit
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Solution Overview
Problem
The alternate arrangement of sub-pixels in current OLED display technologies hinders the design of driving circuits and increases manufacturing complexity, as it requires different threshold voltages and data signal voltages for each sub-pixel, leading to difficulties in simplifying the layout of data lines and dependence on compensation circuits.
Innovation Solution
A pixel structure organized in honeycomb units with specific arrangements of first, second, and third sub-pixels, where each sub-pixel type shares the same threshold voltage and data signal voltage, allowing for vertical and horizontal alignment of same-color sub-pixels, simplifying the driving circuit design and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sub-pixels are arranged alternately in horizontal or vertical direction, then the display resolution can be improved, but the design of driving circuit becomes difficult and manufacturing complexity increases
Solution Approach 1:
The pixel structure is divided into multiple sub-pixels (first sub-pixel, second sub-pixel, third sub-pixel) with different positions and functions within each pixel unit. This segmentation allows for specialized driving circuits for each sub-pixel type, simplifying the overall driving circuit design while maintaining high display resolution through the regular quadrilateral and honeycomb unit arrangements.
Solution Approach 2:
Different sub-pixels are assigned to different locations within the pixel structure (vertex, center, side positions), with each location having specific electrical characteristics. This local quality approach enables optimization of driving circuits for specific regions, reducing overall circuit complexity while achieving high resolution display.
2Reliability
If sub-pixels are arranged alternately, then the display performance can be improved, but the manufacturing process becomes more complex requiring different threshold voltages and data signal voltages for each sub-pixel
Solution Approach 1:
The patent establishes specific voltage parameters for different sub-pixel types (first sub-pixel with first threshold voltage and first data signal voltage, second sub-pixel with second threshold voltage and second data signal voltage, third sub-pixel with third threshold voltage and third data signal voltage). This parameter standardization simplifies the manufacturing process by providing clear voltage specifications for each sub-pixel type, reducing the complexity of producing displays with high performance.
Solution Approach 2:
Each sub-pixel type serves multiple functions: the first sub-pixel is disposed at the vertex and can be driven with specific voltage parameters, the second sub-pixel at the center has different voltage requirements, and the third sub-pixel on the side provides additional display capability. This multi-functional design allows a single pixel structure to achieve high display performance through standardized voltage configurations.
3Ease of manufacture
If the number of sub-pixels is reduced to simulate high resolution, then the manufacturing cost can be reduced, but the display resolution and visual effect deteriorate
Solution Approach 1:
The patent transitions from traditional linear sub-pixel arrangements to a two-dimensional honeycomb unit structure with regular quadrilaterals. This dimensional change allows for more efficient space utilization and creates multiple sub-pixels (first, second, and third sub-pixels) within each pixel unit, achieving high display resolution without proportionally increasing manufacturing complexity or cost.
Solution Approach 2:
The pixel structure employs nested arrangements where honeycomb units contain regular quadrilaterals, which in turn contain multiple sub-pixels at different positions (vertex, center, side). This nested structure maximizes the number of functional sub-pixels within each pixel unit area, achieving high display resolution while maintaining reasonable manufacturing complexity and cost.
Data Source
AI summary
A pixel structure and a display device are provided. The pixel structure is designed and arranged in this way, which is helpful for simplifying a layout design of data lines. In addition, this can reduce dependence on a compensation circuit in a driving circuit. Further, arrangements and shapes of first sub-pixels and second sub-pixels are same. Therefore, a set of masks can be used to make the first sub-pixels and the second sub-pixels together, thereby reducing the mold charge of the masks and saving costs.