OLED Pixel Column Layout With Shared Reference Signal Lines
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Solution Overview
Problem
Existing display apparatuses using organic electroluminescence (organic EL) films face limitations in achieving high definition due to the arrangement of two video signal lines between each pixel, which hinders efficient signal and reference potential distribution.
Innovation Solution
A display apparatus design with a plurality of pixels arranged in rows and columns, featuring separate first and second column signal lines, where the second column signal line is commonly connected to multiple pixels via a selecting transistor, allowing for simultaneous writing of reference potential across multiple pixels, thereby reducing the interval between pixels and enabling high-definition display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If two video signal lines are arranged between respective pixels, then signal and reference potential distribution is achieved, but pixel interval cannot be reduced and high definition cannot be achieved
Solution Approach 1:
The patent segments the signal transmission function into two separate pathways: one for video signals (first video signal line) and another for reference potentials (second video signal line). This segmentation allows each line to be optimized independently and reduces the total space required compared to having multiple functions in a single line arrangement.
Solution Approach 2:
The second video signal line serving reference potentials is designed to be shared across multiple pixel columns. This multi-functional approach allows a single line to serve reference potential distribution for multiple columns, reducing the overall number of lines needed and enabling smaller pixel intervals while maintaining high definition.
2Reliability
If two video signal lines are arranged between respective pixels, then reference potential supply is enabled, but the number of signal lines increases and high definition is hindered
Solution Approach 1:
The second video signal line is designed with multi-functionality, serving as a reference potential line for multiple pixel columns simultaneously. By making this line universal across columns, the patent reduces the total number of signal lines needed while ensuring reliable reference potential supply to all necessary pixels.
Solution Approach 2:
The patent merges the reference potential distribution function across multiple columns into a single shared second video signal line. This combining approach reduces device complexity by minimizing the number of separate lines while maintaining the reliability of reference potential supply through the shared infrastructure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design facilitates high-definition display by minimizing the influence of time constants in signal line writing, narrowing pixel intervals, and maintaining a high frame rate, while also reducing the area required for pixel layout.
Implementation Method 1
A display apparatus using organic electroluminescence (hereinafter, organic EL) film, having light-emitting elements provided on each pixel
Data Source
AI summary
A display apparatus includes a plurality of pixels arranged in a manner forming a plurality of rows and a plurality of columns; a plurality of first column signal lines configured to supply a signal potential to the plurality of pixels in accordance with video data, and at least one second column signal line configured to supply a reference potential to the plurality of pixels. The plurality of first column signal lines and the at least one second column signal line are arranged along columns of the plurality of pixels, and the at least one second column signal line is commonly connected to pixels of at least two columns, among the plurality of pixels.