Display Panel Bus Architecture Reducing Pin Count
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Solution Overview
Problem
The high cost of display panels is a result of increased materials and technologies used, leading to a need for cost reduction in display apparatuses.
Innovation Solution
A display apparatus with a panel drive circuit that includes source drivers, a gate driver, a timing controller, and a shared bus for signal transmission, reducing the number of pins on source drivers and optimizing PCB layout by using a control circuit board and flexible circuit board configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each source driver has independent connection lines from the timing controller, then signal transmission reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
Multiple source drivers share a common bus structure for signal transmission, merging individual connection lines into a shared communication channel. This reduces the total number of connection lines between the timing controller and source drivers while maintaining reliable signal transmission through standardized bus protocols.
Solution Approach 2:
The bus structure serves multiple functions: it provides clock signals, data signals, and control signals to multiple source drivers simultaneously. This multi-functional connection reduces the need for separate dedicated lines for each signal type and driver, simplifying the overall connection architecture.
2Manufacturing precision
If multiple independent connection lines are used for each source driver, then signal control precision is improved, but manufacturing cost and encapsulation complexity increase
Solution Approach 1:
The patent combines multiple signal transmission functions into a shared bus structure, reducing the number of individual connection lines that need to be manufactured and encapsulated. This merging approach maintains signal control precision through standardized bus protocols while significantly reducing manufacturing complexity and cost.
Solution Approach 2:
The invention changes the connection architecture from multiple independent lines to a standardized bus structure with defined signal protocols. This parameter change in the connection approach maintains precise signal control through timing and control signals while reducing the physical number of connections, thereby lowering manufacturing costs.
3Device complexity
If a shared bus is used for signal transmission, then device complexity is reduced, but the likelihood of signal interference increases
Solution Approach 1:
The bus structure includes control signals that provide feedback mechanisms for managing signal transmission. The timing controller uses control signals to coordinate data transmission to multiple source drivers, ensuring that only the intended driver receives data at any given time, thereby preventing signal interference despite the shared physical medium.
Solution Approach 2:
The bus acts as an intermediary structure with built-in control mechanisms. Control signals serve as mediators that manage access to the shared bus, coordinating between the timing controller and multiple source drivers to prevent conflicts and interference while enabling efficient signal transmission.
Data Source
AI summary
The present application discloses a display apparatus and a drive method thereof. The display apparatus includes a display panel, and a panel chive circuit configured to drive the display panel; and a timing controller respectively transmits a signal to source drivers and a gate driver via the bus.