Differential Reception Circuit for Shared Data and Control Signals
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Solution Overview
Problem
In semiconductor devices, transmitting setting information alongside binary data signals using a shared transmission path limits control flexibility and increases device complexity, as it requires separate signal lines for each display driver, restricting the ability to select and control multiple display drivers simultaneously.
Innovation Solution
A semiconductor device with a pair of input terminals and reception circuits that compare input signals to generate output signals, allowing the transmission of non-binary signals through a binary data signal path, enabling high control flexibility without increasing device scale by using a first reception circuit for differential signal comparison and a second reception circuit for comparison with a reference potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate signal lines are provided for each display driver to enable independent control, then control flexibility is improved, but device scale increases
Solution Approach 1:
The transmission path is designed to serve multiple functions: it can transmit both binary data signals and non-binary control signals through the same physical medium. The reception circuit includes multiple reception circuits that can distinguish and process different signal types based on their characteristics, enabling one transmission path to replace what would traditionally require separate signal lines for each display driver.
2Device complexity
If one signal line is commonly used to transmit setting information to multiple display drivers, then device scale is reduced, but control flexibility is lost
Solution Approach 1:
The reception circuit acts as an intermediary that receives signals from the transmission path and determines their type. Based on the signal characteristics (binary vs. non-binary), it routes the signal to appropriate processing circuits. This intermediary mechanism enables a single transmission path to effectively control multiple display drivers independently, as the reception circuit can distinguish between data signals intended for different drivers and control signals.
3Productivity
If a transmission path transmits both binary data signals and non-binary control signals, then signal transmission efficiency is improved, but signal reception accuracy may deteriorate
Solution Approach 1:
The reception circuit is segmented into multiple specialized circuits: a first reception circuit for binary data signals and a second reception circuit for non-binary control signals. Each circuit is optimized for its specific signal type, with dedicated comparison logic (comparing against reference potential or differential comparison). This segmentation ensures that despite the shared transmission path, each signal type is processed with the appropriate precision to maintain reception accuracy.
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
Enables the reception of signals different from binary data signals through a binary data transmission path, allowing for high-degree control freedom while maintaining a compact device design by using a first reception circuit for differential signal comparison and a second reception circuit for state control signal detection.
Implementation Method 1
a first reception circuit which compares in potential the first input signal with the second input signal, and generates a first output signal based on a comparison result therebetween
Implementation Method 2
a second reception circuit which generates a second output signal based on a comparison result of comparing in potential at least one of the first input signal and the second input signal with a reference potential
Data Source
AI summary
A semiconductor device includes: a pair of input terminals or receiving a first input signal and a second input signal each of which changes between potentials in a predetermined range via a pair of transmission paths which include a first transmission path and a second transmission path; a first reception circuit which compares in potential the first input signal with the second input signal, and generates a first output signal based on a comparison result therebetween; a second reception circuit which generates a second output signal based on a comparison result of comparing in potential at least one of the first input signal and the second input signal with a reference potential.