Display Driving Circuit Buffer for Multiple Inversion Modes
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Solution Overview
Problem
Existing display driving circuits require different configurations for various inversion driving methods, leading to increased manufacturing costs and complexity in display apparatuses.
Innovation Solution
A display driving circuit with a digital-to-analog converter and a buffer circuit that includes an input stage, selection circuit, and multiple output stages, allowing operation in multiple modes such as column inversion and dot inversion, by applying signals to different voltage levels based on mode signals and polarity inversion signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different display driving circuits are used for various inversion driving methods, then the display apparatus can support multiple driving modes, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent implements a universal display driving circuit that can operate in multiple inversion driving modes (frame inversion, line inversion, dot inversion) by using a single buffer circuit design with selectable voltage configurations. The buffer circuit includes first and second output stages that can be selectively activated based on the driving mode, allowing one circuit to perform multiple functions that previously required separate dedicated circuits for each mode.
2Adaptability or versatility
If different display driving circuits are used for various inversion driving methods, then the display apparatus can support multiple driving modes, but the manufacturing cost increases
Solution Approach 1:
The patent reduces manufacturing cost by eliminating the need to produce and stock multiple different driving circuit variants. A single buffer circuit design with mode selection capability replaces what would otherwise require separate dedicated circuits for frame inversion, line inversion, and dot inversion modes, simplifying the manufacturing process and reducing inventory requirements.
3Ease of manufacture
If a single display driving circuit is used for various inversion driving methods, then manufacturing cost is reduced, but the circuit must handle multiple voltage configurations
Solution Approach 1:
The patent employs dynamic voltage configuration within the buffer circuit, where the first and second output stages can be selectively activated based on the driving mode. The circuit dynamically adjusts which output stage is active and what voltage levels are applied, allowing a single static circuit design to handle multiple dynamic voltage configurations required for different inversion driving modes.
Data Source
AI summary
A display driving circuit includes a digital-to-analog converter configured to convert a digital image signal to an analog image signal, and a buffer circuit configured to receive the analog image signal and to output an output signal to be applied to a data line, where the buffer circuit includes an input stage configured to receive the analog image signal and to output a first signal, a first output stage configured to receive a first voltage and a second voltage and to output the output signal, a second output stage configured to receive a third voltage and a fourth voltage and to output the output signal, and a selection circuit configured to apply the first signal from the input stage to the first output stage or the second output stage in response to a mode signal.