Display Panel Driving Device with Asymmetric Circuit Boards
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Solution Overview
Problem
The challenge in the TFT-LCD display industry is to reduce the display area of liquid crystal panels without affecting the display effect, particularly in high-resolution displays like 4K HD and above, where existing systems require multiple components and flexible flat cables, increasing complexity and cost.
Innovation Solution
A driving device for a display panel that integrates a system-on-chip, asymmetric transmission circuit boards, and a source driver with chip-on-film (COF) technology, where the system-on-chip outputs signals through a single flexible flat cable to ensure equal signal transmission distances to symmetrical positions on the panel, omitting the timing control board and integrating power supply and voltage generation functions on the transmission circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a timing control board and two flexible flat cable connections are used to connect the T-CON board and transmission board, then the display device can function properly, but the display area increases and the device complexity increases
Solution Approach 1:
The patent removes the timing control board from the display device structure, integrating its functions directly into the system-on-chip. This extraction of the unnecessary component eliminates the need for two flexible flat cable connections, thereby reducing display area while maintaining proper device functionality through the simplified direct connection architecture
Solution Approach 2:
The patent combines the timing control functions with the system-on-chip, merging multiple functions into a single integrated component. This consolidation eliminates separate timing control boards and reduces the number of cable connections needed, achieving both functionality and compactness
2Reliability
If two flexible flat cable connections are used between the T-CON board and transmission board, then the display device can operate, but the device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the timing control board that required two flexible flat cable connections, simplifying the connection architecture to use only a single flexible flat cable between the system-on-chip and transmission board, thereby reducing device complexity and cost while maintaining operational reliability
Solution Approach 2:
Instead of using a separate timing control board with multiple cable connections as in conventional designs, the patent inverts the architecture by integrating timing control functions directly into the system-on-chip, achieving simpler connections and lower complexity
3Adaptability or versatility
If the system-on-chip is connected to multiple transmission circuit boards through multiple cables, then signal coverage is improved, but the display area and cost increase
Solution Approach 1:
The patent transitions from a multi-cable spatial arrangement to a single-cable connection with signal routing through the asymmetric transmission circuit boards. The asymmetric design allows one board to handle both data and power signals while the other handles only data, achieving comprehensive signal coverage through functional differentiation rather than physical multiplication of cables
Solution Approach 2:
The first transmission circuit board is designed to handle multiple functions including data transmission and power supply delivery, while the second board handles data transmission. This multi-functional design allows a single flexible flat cable to provide comprehensive signal coverage that would otherwise require multiple specialized cables
Data Source
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AI summary
The application relates to a driving device for a display panel, including: a system-on-chip, a first transmission circuit board, a second transmission circuit board, a source driver and a gate driver. The first transmission circuit board and the second transmission circuit board are juxtaposed on the source side of the display panel and connected by a connector, the source driver includes a plurality of source chip on films on the source side and connected to the display panel, the first transmission circuit board and the second transmission circuit board are respectively connected to corresponding ones of the plurality of source chip on films. The signal transmission distances of the data output end of the system-on-chip to the source COFs respectively connected to symmetrical positions of the display panel are equal, ensuring the symmetry and stability of the transmitted signal.