Display Substrate Select Switch Arrays Reduce Fan-out Area
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Solution Overview
Problem
In small, specially shaped display devices like smartwatches, the need to reduce headspace poses design challenges due to the requirement for accommodating data lines, which increases the fan-out area and complicates the design.
Innovation Solution
A display substrate with select switch arrays and selecting control circuits allows each data line to connect with two columns of pixels, using different gate lines, reducing the number of data lines and fan-out area required, and utilizing a single data voltage input terminal to drive multiple columns of pixels, thereby minimizing headspace and design complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If each data line is connected to one column of pixels in conventional display devices, then the pixel driving function is achieved, but the fan-out area increases and headspace becomes large
Solution Approach 1:
The patent merges multiple pixel columns into a single data line connection through select switch arrays. Each data line is connected to multiple pixel columns via select switches that are controlled by selecting control circuits, allowing one data line to serve multiple columns that would traditionally require separate data lines. This merging reduces the number of data lines needed and minimizes the fan-out area.
Solution Approach 2:
The patent introduces dynamic control through select switch arrays and selecting control circuits. The select switches are dynamically turned on and off based on selecting control signals to route data voltages to different pixel columns at different times. This dynamic switching capability allows a single data line to efficiently serve multiple pixel columns, reducing the static fan-out area requirement.
2Area of stationary object
If the fan-out area is reduced to minimize headspace, then the headspace is reduced, but accommodating all data lines becomes difficult
Solution Approach 1:
The patent adds the time dimension to the data line-pixel connection through dynamic switching. Instead of requiring all data lines to be simultaneously available in the fan-out area, the system uses selecting control circuits to activate different data lines at different times based on pixel column requirements. This temporal multiplexing allows the fan-out area to be reduced while maintaining the capability to accommodate all necessary data connections.
Solution Approach 2:
The patent makes data lines universal by enabling each data line to serve multiple pixel columns through the select switch array mechanism. A single data line can be dynamically routed to different pixel columns depending on the selecting control signals, giving the data line multiple functions and eliminating the need for dedicated one-to-one data line-column assignments.
3Manufacturing precision
If multiple data driving circuits are used to drive each column, then the pixel driving precision is improved, but the manufacturing cost increases
Solution Approach 1:
The patent introduces select switch arrays and selecting control circuits as intermediary components between data lines and pixel columns. These intermediaries maintain pixel driving precision by providing controlled, selective routing of data voltages to specific pixel columns, eliminating the need for multiple independent data driving circuits while preserving the precision required for accurate pixel control.
Data Source
AI summary
Embodiments of the disclosure provide a display substrate and a driving method thereof, as well as a display device. The display substrate comprises a plurality of select switch arrays and a plurality of selecting control circuits formed on the base substrate. Each select switch array comprises a plurality of select switches, a first terminal of each select switch being connected to a corresponding data line, a second end of each select switch being connected to a same data voltage input terminal, a control terminal of each select switch being connected to a same selecting control circuit. Each data line is connected with two columns of pixels, and the gate lines connected with the two columns of pixels are different. Each selecting control circuit is connected to a plurality of selecting control signal input terminals and a corresponding select switch array.