Display Panel Pixel Circuit Sharing for Higher Pixel Density
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Solution Overview
Problem
Current LED displays for outdoor and central control large screens have low pixel density due to large pixel pitch and low pixels per inch, limiting their effectiveness for close-up viewing.
Innovation Solution
A display panel design with a pixel unit configuration that includes a pixel driver circuit, sub-pixels, and a switching circuit, where multiple sub-pixels share a single pixel driver circuit via a switching unit, allowing for reduced space occupancy and increased pixel density through multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each sub-pixel is equipped with an independent pixel driver circuit, then the driving capability and reliability are improved, but the space occupancy increases and pixel density decreases
Solution Approach 1:
Multiple sub-pixels share a common pixel driver circuit, merging the driving function into a single circuit that serves multiple sub-pixels. This is achieved by providing a pixel driver circuit that can sequentially drive multiple sub-pixels within a pixel unit, thereby reducing the total number of driver circuits needed and decreasing space occupancy while maintaining driving capability through time-multiplexed operation
Solution Approach 2:
The pixel driver circuit is designed with multi-functionality to serve multiple sub-pixels. The circuit can switch between different sub-pixels and perform multiple driving functions, making a single circuit perform the work of what would traditionally require multiple separate circuits, thus reducing space requirements while maintaining full driving capability
2Quantity of substance
If the pixel pitch is reduced to increase pixel density, then the pixels per inch is improved, but the manufacturing precision and signal transmission quality deteriorate
Solution Approach 1:
The patent introduces a switching circuit dimension between the pixel driver circuit and sub-pixels, allowing for compact arrangement of pixel units. By adding this control dimension with switching units that can selectively connect different sub-pixels to the shared driver circuit, the design achieves high pixel density without compromising signal transmission quality, as the switching circuit manages signal routing efficiently in the reduced space
3Area of moving object
If multiple sub-pixels share a single pixel driver circuit, then the space occupancy is reduced and pixel density is increased, but the circuit complexity increases
Solution Approach 1:
The pixel driver circuit is segmented into functional modules that can be sequentially activated. The circuit includes distinct stages for different sub-pixels, with switching units that divide the control function. This segmentation allows the shared driver circuit to manage multiple sub-pixels through time-division multiplexing, reducing space occupancy while organizing the complexity into manageable, modular functional blocks
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
The design significantly increases pixel density by reducing the overall space occupied by each pixel unit, enabling higher pixel layout density and improved display performance.
Implementation Method 1
the switching unit is configured to conduct a communication path between the corresponding sub-pixel and the pixel driver circuit in response to the switching signal
Implementation Method 2
the sub-pixel is configured to emit light under an action of the driving current
Data Source
AI summary
The present disclosure provides a display panel and a display device. The display panel includes a plurality of pixel units distributed in an array. The pixel unit includes: a pixel driver circuit configured to provide a driving current, a plurality of sub-pixels configured to emit light under an action of the driving current, and a switching circuit including a plurality of switching units arranged in correspondence with the plurality of sub-pixels. The switching unit is connected in series between the pixel driver circuit and a corresponding sub-pixel, a control end of the switching unit is configured to receive a switching signal, a first end of the switching unit is connected to the pixel driver circuit, a second end of the switching unit is connected to the corresponding sub-pixel, and the switching unit conducts a communication path between the sub-pixel and the pixel driver circuit in response to the switching signal.