Dual Scanning Line Pixel Layout for Uniform Display Brightness
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Solution Overview
Problem
In display devices, the voltages of sub pixel electrodes in adjacent pixels within the same row differ due to parasitic capacitance caused by scanning lines, leading to uneven brightness across the display.
Innovation Solution
The implementation of a display device with a group of scanning lines, where each pixel row is driven by a pair of scanning lines arranged on either side, preventing overlap and minimizing the impact of electrical potential changes on sub pixel electrodes, thus maintaining equal voltages across adjacent pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a scanning line is connected to pixels in a conventional manner, then the pixel row can be driven, but parasitic capacitance causes voltage differences in sub pixel electrodes leading to uneven brightness
Solution Approach 1:
The patent changes the spatial arrangement of scanning lines from a conventional single-line configuration to a dual-line configuration positioned above and below the pixel row. This dimensional change in the scanning line layout eliminates the parasitic capacitance coupling between scanning lines and sub pixel electrodes, thereby resolving the voltage uniformity issue while maintaining proper pixel driving functionality
2Ease of operation
If the scanning line extends across sub thin film transistors, then pixel driving is enabled, but parasitic capacitance is generated between scanning line and sub pixel electrode
Solution Approach 1:
The patent extracts the harmful parasitic capacitance effect by repositioning the scanning lines to be located above and below the pixel row rather than extending across the sub thin film transistors. This separation removes the unwanted electrical coupling between scanning lines and sub pixel electrodes while preserving the essential pixel driving function through the main thin film transistors
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 configuration ensures uniform luminance across sub pixel opening areas by preventing the sub pixel electrodes from being affected by secondary feeder voltages, thereby improving luminance uniformity.
Implementation Method 1
A scanning line GLN−1 is configured to transmit a scanning signal GN−1. A scanning line GLN is configured to transmit a scanning signal GN.
Implementation Method 2
The scanning line GLN extends across the first sub thin film transistor T12, and such a cross-line condition causes a parasitic capacitance Cgs2 to exist between the scanning line GLN and the first sub pixel electrode SP1.
Data Source
AI summary
A display device and an electronic equipment are provided, which are belonging to a field of display technology. The display device includes a plurality of scanning lines and a plurality of pixels. By constructing a first scanning line and a second scanning line on two sides of a pixel row in a first direction, an overlapping of the first scanning line and/or the second scanning line with the pixel row in a thickness direction of the display device can be avoided, thereby keeping the voltages of the sub pixel electrodes of two adjacent pixels in a same row are the same.