OLED Display Panel Switching Circuit Voltage Segmentation
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Solution Overview
Problem
In Organic Light Emitting Diode (OLED) display panels, the data signal voltage on the data line is unstable, affecting the display image quality.
Innovation Solution
A display panel design where two adjacent switching units are connected to sub-pixels with the same maximum grayscale value voltage, allowing the source driver circuit to output stable data signals without the need for voltage switching, thereby improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the source driver circuit switches voltage levels to accommodate different maximum grayscale value voltages of different sub-pixels, then all sub-pixels can be driven correctly, but the data signal voltage becomes unstable and image quality deteriorates
Solution Approach 1:
The pixel units are divided into different types (first pixel units with first sub-pixels having first maximum grayscale value voltages, and second pixel units with second sub-pixels having second maximum grayscale value voltages). Each type is connected to dedicated switching units that maintain consistent voltage levels, segmenting the voltage domains to prevent mixing different voltage levels on the same data line.
Solution Approach 2:
Different switching units are configured with different voltage levels according to their connected sub-pixel types. The first switching units operate at first voltage levels for first sub-pixels, while second switching units operate at second voltage levels for second sub-pixels, creating local voltage zones that match the specific requirements of each sub-pixel type.
2Adaptability or versatility
If voltage switching is performed frequently to adapt to different sub-pixel requirements, then all pixel types can be supported, but power consumption increases
Solution Approach 1:
The data lines are segmented into different voltage domains, with each domain serving a specific type of sub-pixel. This segmentation eliminates the need for the source driver circuit to frequently switch voltage levels, as each switching unit maintains a consistent voltage level for its dedicated sub-pixel type, thereby reducing power consumption.
3Reliability
If different voltage levels are used for different sub-pixels, then each sub-pixel can operate at optimal voltage, but the data signal becomes unstable during transitions
Solution Approach 1:
Each switching unit is locally optimized to operate at a specific voltage level matching its connected sub-pixel type. This local optimization ensures that each sub-pixel receives the appropriate voltage for optimal operation while maintaining voltage consistency within each local domain, preventing signal instability during transitions.
Solution Approach 2:
All switching units connected to the same type of sub-pixel are maintained at the same voltage level, creating equipotential zones. This eliminates voltage differences and potential instability during signal transitions, as the data signal remains at a consistent voltage level within each sub-pixel type domain.
Data Source
AI summary
The present disclosure provides a display panel, a method for preparing the same, and a display device. The display panel includes pixel units distributed in an array in a display area, where the pixel units include sub-pixels, at least one of which has a maximum grayscale value voltage different from a maximum grayscale value voltage of the other sub-pixel; and a switching circuit including switching units on a side of the display area, where one end of the switching unit is connected to a data line. In two adjacent columns of pixel units, two sub-pixels having the same maximum grayscale value voltage are connected to two adjacent switching units through data lines, respectively.