Pixel Driving Circuit Sharing Scan Lines for Narrow Border Displays
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Solution Overview
Problem
As display sizes increase, the area of the non-display region in display devices grows, making it challenging to achieve narrow borders due to the complexity and size of the display driving circuit, which needs to be simplified.
Innovation Solution
The implementation of a pixel driving circuit that shares components between adjacent pixel units, reducing the number of pixel driving circuits and scan lines, allowing the gate driver to be placed in the display region, thereby facilitating a narrow border design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display size increases and the number of pixel units increases, then the display area increases, but the area of the non-display region increases excessively due to more pixel driving circuits and scan lines
Solution Approach 1:
The patent merges the pixel driving circuit into the display region by sharing scan lines between display and non-display areas. Specifically, the same scan line is used to control both pixel units in the display region and pixel units in the non-display region, eliminating the need for separate scan lines for the non-display area. This integration reduces the overall number of scan lines and allows the gate driver to be positioned within the display region, thereby reducing the non-display area.
Solution Approach 2:
The patent implements multi-functionality by making scan lines serve dual purposes: controlling pixel units in the display region and controlling pixel units in the non-display region. The gate driver also serves multiple functions by being positioned in the display region while driving both display and non-display pixel units through shared scan lines. This universal usage of scan lines and gate driver reduces the total number of components and minimizes the non-display area.
2Quantity of substance
If the number of pixel driving circuits increases to support more pixel units, then the display resolution increases, but the device complexity increases due to more scan lines and driving circuits
Solution Approach 1:
The patent combines the control of display region pixel units and non-display region pixel units into a single pixel driving circuit located in the display region. This merged circuit shares scan lines with the non-display area, reducing the total number of scan lines and simplifying the overall circuit structure while maintaining the ability to drive a large number of pixel units.
Solution Approach 2:
The pixel driving circuit in the display region is designed with universal functionality to control both display and non-display pixel units through shared scan lines. This multi-functional design reduces device complexity by eliminating redundant circuits and scan lines, while still supporting a high quantity of pixel units for high resolution.
Data Source
AI summary
This disclosure relates to a pixel driving circuit for driving a pixel group with two adjacent pixel units. The pixel group includes a first pixel unit and a second pixel unit. Each pixel driving circuit is capable of driving the first pixel unit and the second pixel unit in one same pixel group. The pixel driving circuit includes a driving module, a first switching module, and a second switching module. The driving module includes a control terminal, a first connecting terminal, a second connecting terminal and a driving transistor, and the control terminal is capable of storing voltage, the driving module is configured to adjust and control the magnitude of an electrical signal passing through the driving transistor due to the voltage stored at the control terminal. A display device having the pixel driving circuit is also provided.