LTDI Chip Pin Reduction via Segmented Gate Signal Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The current large touch display integrated (LTDI) system faces challenges due to the master LTDI chip needing to send multiple control signals, resulting in a large number of pins, which limits packaging options and increases costs.
Innovation Solution
A driving signal processing method where multiple LTDI chips, including a master and slave chips, dispersely output gate control signals to a level shifter or gate driver, reducing the number of pins required on each chip by sharing the output of M gate control signals, with each chip outputting M/N signals and communicating synchronously through a reference clock signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the master LTDI chip centrally sends all gate control signals, then the control function is complete, but the number of pins increases and packaging flexibility decreases
Solution Approach 1:
The gate control signal output function is segmented across multiple LTDI chips. Instead of one master chip handling all M gate control signals, the system divides the output among N LTDI chips, with each chip responsible for M/N signals. This segmentation reduces the pin count per chip from M to M/N, improving packaging flexibility while maintaining complete control functionality through coordinated operation of all chips.
2Ease of manufacture
If the master LTDI chip outputs all M gate control signals, then the display control is complete, but the cost increases
Solution Approach 1:
The system segments the gate control signal generation and output across multiple LTDI chips, reducing the pin requirements for each individual chip. This enables the use of standard packaging solutions with fewer pins, thereby reducing manufacturing costs while maintaining complete display control functionality through the coordinated output of all N chips.
Solution Approach 2:
Each LTDI chip is designed with multi-functionality, capable of both generating display data and outputting gate control signals. This universal design allows any of the N chips to contribute to gate control signal output, eliminating the need for a specialized master chip with high pin count, thus reducing overall system cost while maintaining full control capability.
3Device complexity
If multiple LTDI chips dispersely output gate control signals, then the pin count per chip decreases, but signal coordination becomes more complex
Solution Approach 1:
The system implements feedback mechanisms where each LTDI chip receives control signals and coordinates its gate control signal output based on feedback from other chips. This feedback ensures that the dispersed output of M/N signals per chip remains synchronized and properly coordinated, resolving the complexity of signal coordination while maintaining reduced pin counts.
Solution Approach 2:
The gate control signals are output in a periodic and synchronized manner across all N LTDI chips. Each chip outputs its M/N signals at coordinated intervals based on a common timing reference, ensuring that the dispersed output maintains proper synchronization and coordination without requiring complex real-time communication between chips.
Data Source
AI summary
A driving signal processing method for a large touch display integrated (LTDI) system is provided. The LTDI system includes plural LTDI chips that are concatenated. The LTDI chips include a master LTDI chip and plural slave LTDI chips. The driving signal processing method includes: receiving, by the LTDI chips, display data from a timing controller; and dispersedly outputting, by the master LTDI chip and at least one of the slave LTDI chips, M gate control signals respectively corresponding to M gate lines of a display panel of the LTDI system according to the display data during the display stage of the display panel.