Scanning Line Circuit Layout for Narrow-Bezel Shaped Displays
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Solution Overview
Problem
The challenge of designing a display device with a non-rectangular display region is the complexity in arranging peripheral circuits and wirings, which complicates achieving a narrow frame width due to increased numbers of scanning lines and transistors.
Innovation Solution
The display device employs a scanning line drive circuit adapted to non-rectangular shapes, utilizing a bus wiring group with multiple phase clocks and unit circuits formed as shift registers, with transistors, and arranging these components in a way that they do not cross each other, allowing for a common wiring between regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display region is shaped other than a rectangle, then the display device can meet specific application requirements (e.g., automobile, game machines), but the layout of peripheral circuits and wirings becomes complicated
Solution Approach 1:
The scanning line drive circuit is divided into multiple unit circuits, each corresponding to a specific region of the display panel. This segmentation allows each unit circuit to be independently optimized and positioned, simplifying the overall layout complexity while maintaining the non-rectangular display shape adaptability
Solution Approach 2:
The patent positions unit circuits at different locations around the display region, utilizing available space in multiple directions. This spatial distribution approach transforms the two-dimensional layout problem into a multi-dimensional space utilization solution, reducing wiring complexity while preserving the non-rectangular display configuration
2Measurement precision
If the number of scanning lines is increased to achieve high resolution, then the display resolution is improved, but the frame width becomes difficult to reduce due to increased circuitry area
Solution Approach 1:
The scanning line drive circuit is segmented into multiple unit circuits distributed around the display region. This segmentation allows the circuit area to be spread out rather than concentrated in one location, enabling high resolution with many scanning lines while keeping the frame width narrow by utilizing peripheral space efficiently
Solution Approach 2:
Different regions of the display panel are assigned different unit circuits based on local requirements. This local optimization allows the circuit layout to adapt to the specific geometry of each region, maximizing space utilization and minimizing the overall frame width while supporting high resolution
3Area of stationary object
If unit circuits are arranged around the display region, then the layout area is reduced, but the wirings and transistors may cross each other complicating the design
Solution Approach 1:
The display region is divided into multiple sections, each served by a dedicated unit circuit. This segmentation creates natural boundaries for wiring routes, preventing crossings by confining each unit circuit's connections to its specific region, thus reducing overall wiring complexity while maintaining compact layout
Data Source
AI summary
A display device with a variant-shape display region other than the rectangular display region is configured to form a scanning line drive circuit along the variant-shape display region. The scanning line drive circuit includes bus wiring group with clock wiring for supplying clocks with three or more phases and the power supply wiring for supplying power, and the unit circuits for configuring the shift register including five or more transistors. The bus wiring and the unit circuits are formed on the different regions so as not to cross with one another.