Display Driving Apparatus Multiplexer Pin Sharing
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Solution Overview
Problem
Conventional driving apparatuses for display panels require additional pins and interfaces to transmit information data, leading to increased circuit area and cost, especially when handling complex or large amounts of data.
Innovation Solution
A driving apparatus incorporating a multiplexer and output circuit that shares a single output circuit to transmit both display and information data, eliminating the need for additional pins and enabling simultaneous output through multiple channels, thus reducing transmission time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional pins and interfaces are used to transmit information data, then the transmission capability is improved, but the circuit area and cost increase
Solution Approach 1:
The output circuit is designed to perform multiple functions: it can output both display data to the display panel and information data to external devices through the same physical pins. A multiplexer selectively connects the output circuit to different data sources (display data or information data) based on the operating mode, enabling one circuit to serve multiple purposes without requiring separate dedicated circuits for each function.
2Adaptability or versatility
If additional pins are used for information data output, then the data transmission capability is improved, but the pin count increases
Solution Approach 1:
The same output pins that connect to the display panel are reused for information data transmission. The multiplexer dynamically switches the connection so that during normal display operation, the pins transmit display data, while during testing or diagnostic modes, the same pins transmit information data such as test results or device status.
3Reliability
If conventional separate circuits are used for information data, then the data transmission is reliable, but the device complexity increases
Solution Approach 1:
The output circuit for information data is merged with the display data output circuit. Instead of having separate dedicated output circuits and pins for information data, the patent combines both functions into a single shared output circuit controlled by a multiplexer, thereby reducing overall circuit complexity while maintaining the reliability of data transmission through proper mode switching.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for efficient transmission of complex information data without additional pins, saving pin count and reducing transmission time, particularly benefiting integrated circuit testing procedures.
Implementation Method 1
The output circuit is configured to convert digital data into an analog voltage, and output the analog voltage via at least one output terminal of the output circuit
Data Source
AI summary
A driving apparatus capable of driving a display panel is provided. The driving apparatus can include a multiplexer and an output circuit. The multiplexer may include at least one first input terminal configured to receive information data in a first mode, at least one second input terminal configured to receive display data in a second mode, and at least one output terminal coupled to at least one input terminal of the output circuit. The output circuit can be configured to convert digital data into an analog voltage and output the analog voltage via at least one output terminal of the output circuit. The output circuit can be configured to convert the information data in the first mode and convert the display data into at least one driving voltage for driving at least one data line of the display panel in the second mode. The information data cannot be used for driving the display panel to present an image.