Integrated LCD Driving Circuit Reducing Component Count
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Solution Overview
Problem
Existing liquid crystal display devices face limitations in reducing panel size, fabrication cost, and power consumption due to the presence of multiple data and gate driving integrated circuits, circuit films, and controllers.
Innovation Solution
The integration of a gate built-in circuit within the liquid crystal panel, a driving integrated circuit for both gate and data lines, and a pad region with input/output terminals connected to the driving integrated circuit, which reduces the number of data lines and minimizes the size and thickness of the display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple data and gate driving integrated circuits, circuit films, and controllers are used, then the liquid crystal display device can function properly, but the size and fabrication cost increase
Solution Approach 1:
The patent merges the gate driving circuit and data driving circuit into a single integrated driving circuit. The gate driving unit generates gate signals for gate lines, while the data driving unit generates data signals for data lines, both integrated in one chip. This consolidation reduces the number of separate components (multiple driving ICs and circuit films) while maintaining the necessary display functions, directly addressing the contradiction between reliability and device complexity
Solution Approach 2:
The driving integrated circuit performs multiple functions: it acts as both a gate driver and a data driver. The gate driving unit handles gate line control, the data driving unit handles data line control, and the circuit also includes signal relay units and power generation units. This multi-functional design eliminates the need for separate specialized circuits, reducing overall system complexity while preserving full display functionality
2Reliability
If multiple driving integrated circuits and circuit films are used, then the display can be driven, but the fabrication cost increases
Solution Approach 1:
By combining multiple driving functions into a single integrated circuit, the patent reduces the total number of components that need to be manufactured, assembled, and tested. Fewer separate driving ICs and circuit films mean reduced fabrication costs for materials, assembly processes, and quality control, while the integrated circuit itself is designed to provide all necessary driving capabilities
3Reliability
If multiple driving integrated circuits and circuit films are used, then the display can be driven, but power consumption increases
Solution Approach 1:
The integration of gate driving and data driving functions into a single circuit reduces the total power consumption. The integrated design allows for more efficient power management, shared power supply circuits, and reduced signal transmission distances compared to multiple separate circuits. The power generation unit within the integrated circuit can optimize power distribution to different functional units, reducing overall energy consumption while maintaining full driving capability
Data Source
AI summary
A liquid crystal display device includes: a liquid crystal panel including a plurality of pixel cells formed at every regions defined by a plurality of data lines and gate lines; a gate built-in circuit, built-in the liquid crystal panel, for supplying gate-on voltages to the gate lines; a driving integrated circuit for driving the gate built-in circuit and supplying video signals to the data lines; and a pad region including a plurality of input/output terminals electrically connected to input/output bumps of the driving integrated circuit in the liquid crystal panel.