OLED Display Power Line Reduction via Pixel Sharing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The large number of power voltage supply lines in OLED panels reduces the aperture ratio and brightness of OLED display devices, increases cost, and enlarges their size.
Innovation Solution
The OLED display device is designed with a reduced number of power voltage supply lines by having adjacent pixels share a single power voltage supply line, and the use of transistors and storage capacitors to control current flow and data voltage, along with a reset signal to maintain transistor states, optimizing the arrangement of gate and data lines with reset lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each pixel is provided with an independent power voltage supply line, then each pixel can receive stable power supply voltage, but the number of power voltage supply lines increases, reducing aperture ratio and brightness
Solution Approach 1:
The patent merges the power supply function by providing a single power voltage supply line that serves multiple pixels (specifically two pixels per power voltage supply line). This is achieved by configuring the OLED driving circuit to share the power voltage from a common line, thereby reducing the total number of power voltage supply lines while maintaining reliable power supply to all pixels.
Solution Approach 2:
The power voltage supply line is designed to perform multiple functions by supplying power to multiple pixels simultaneously. This multi-functional approach allows a single power voltage supply line to serve the power supply needs of multiple pixels, reducing the overall line count and increasing the aperture ratio without compromising power supply stability.
2Reliability
If each pixel is provided with an independent power voltage supply line, then power supply to each pixel is ensured, but the device size and cost increase
Solution Approach 1:
The patent combines multiple power supply functions into a single power voltage supply line that serves multiple pixels. By merging the power supply paths and using a shared power line with appropriately configured driving circuits, the total number of lines is reduced, simplifying the device structure and lowering cost while ensuring each pixel receives adequate power supply.
3Area of stationary object
If the number of power voltage supply lines is reduced, then aperture ratio and brightness increase, but power distribution control becomes more challenging
Solution Approach 1:
The patent segments the pixel array into groups where each group is served by a dedicated power voltage supply line. Specifically, two pixels are assigned to share one power voltage supply line, creating a segmented power distribution structure. This segmentation approach maintains manageable control complexity while reducing the total number of power lines and increasing aperture ratio.
Solution Approach 2:
The patent applies local quality by configuring the OLED driving circuit with specific transistors and capacitors that are locally optimized for shared power supply operation. The driving circuit includes components that can locally regulate and control the shared power voltage, ensuring each pixel receives appropriate power levels despite the reduced number of power voltage supply lines.
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 effectively reduces the number of power voltage supply lines, enhances the aperture ratio and brightness of OLED panels, and decreases their size and cost while maintaining reliable operation by preventing characteristic changes in the OLED driving circuits.
Implementation Method 1
electrons and the holes fed from the electron carrier layer and the hole carrier layer emit a light by their re-combination at the light-emitting layer
Data Source
AI summary
An organic light emitting diode (OLED) display device for reducing the number of lines of an organic light emitting diode panel is provided. The OLED display device includes first and second data lines; a power voltage supply line supplied with a power supply voltage; a gate line crossing the first data line, the second data line and the power voltage supply line; first and second organic light emitting diodes commonly connected to the power voltage supply line; a first organic light emitting diode driving circuit for driving the first organic light emitting diode with a data voltage from the first data line in response to a scanning signal from the gate line; and a second organic light emitting diode driving circuit for driving the second organic light emitting diode with a data voltage from the second data line in response to the scanning signal from the gate line.