Integrated Display Driving Circuit Reducing Element Count
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Solution Overview
Problem
Current display devices have a complex structure due to separate scan and data driving circuits, which increases the number of elements and production costs, and there is a need to integrate these circuits to reduce the number of elements and create a more compact design.
Innovation Solution
A display module with a driving circuit that includes at least one first and second driving unit, where a non-DC signal is transmitted between them to control the units, and a level converting circuit that outputs signals to both the scan and data lines, allowing for the simultaneous processing of scanning and display signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate scan driving circuit and data driving circuit are used, then driving function is complete, but device complexity increases and number of elements increases
Solution Approach 1:
The patent merges the scan driving circuit and data driving circuit into a single integrated driving circuit. The driving circuit includes a shift register unit that generates both scan signals and data signals, eliminating the need for separate driving circuits. This integration directly reduces the number of driving elements while maintaining complete driving functionality for the display panel.
Solution Approach 2:
The driving circuit is designed with multi-functionality to perform both scan driving and data driving operations. The shift register unit can operate in different modes to generate scan signals for row selection and data signals for column data transmission, allowing one circuit to fulfill multiple driving functions that previously required separate dedicated circuits.
2Ease of manufacture
If data driving circuit and scan driving circuit are integrated, then number of elements decreases and production cost lowers, but signal control complexity increases
Solution Approach 1:
The integrated driving circuit is segmented into functional units with distinct responsibilities. The shift register unit is divided into stages that separately handle scan signal generation and data signal generation. This segmentation allows complex signal control to be managed through modular functional blocks, reducing the overall manufacturing complexity while maintaining signal integrity.
Solution Approach 2:
The driving circuit performs preliminary signal processing and preparation within the integrated structure. The shift register unit pre-generates and buffers both scan and data signals before they are output to the display panel. This preliminary action simplifies the manufacturing process by consolidating signal preparation functions in one location rather than requiring coordinated control between separate circuits.
3Productivity
If non-DC signal is transmitted between driving units, then signal efficiency improves, but signal stability requirement increases
Solution Approach 1:
The driving circuit uses periodic clock signals to control the transmission and latching of data between driving units. The non-DC signals are synchronized to the clock cycle, with data being transferred during specific clock phases. This periodic action maintains signal efficiency for high-speed data transmission while ensuring signal stability through predictable, rhythmically repeating signal patterns that are easier to manage than arbitrary non-periodic signals.
Data Source
AI summary
A display module includes a scan line, a data line, a driving circuit and a level converting circuit. The driving circuit has at least one first driving unit and at least one second driving unit electrically connected to the first driving unit. A non-DC signal is transmitted between the first driving unit and the second driving unit for controlling the first driving unit and/or the second driving unit. The first driving unit outputs a first driving signal to the scan line. The second driving unit outputs a second driving signal to the level converting circuit. The level converting circuit is electrically connected with the driving circuit and the data line, and outputs a display signal to the data line according to the second driving signal. A driving method of the display module is also disclosed.