LCD Driver Singular Control for Voltage Fluctuation
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Solution Overview
Problem
High-resolution liquid crystal display drivers face integration limitations when using a single semiconductor chip, necessitating a method to drive high-resolution panels with increased pixel and bit depth, and addressing power supply voltage fluctuations that can cause semiconductor chip failures and pixel burn-in.
Innovation Solution
A liquid crystal display device with multiple drivers, each equipped with a power reception section, detection section, shifting section, and driver connection section, allowing for singular control and notification between drivers when the power supply voltage falls below a predetermined value, enabling simultaneous shift to abnormal sequence operation to prevent failures and burn-in.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single semiconductor chip is used to drive high-resolution liquid crystal display panels, then the device complexity is reduced, but the manufacturing precision and integration capability become insufficient to meet high-resolution requirements
Solution Approach 1:
The liquid crystal display driver is divided into multiple semiconductor chips (first liquid crystal display driver and second liquid crystal display driver) that operate in parallel. Each chip handles a portion of the pixel circuits, enabling high-resolution display capabilities while maintaining manageable complexity through modular architecture. The first substrate includes first pixel circuits driven by the first driver and second pixel circuits driven by the second driver.
2Productivity
If multiple liquid crystal display drivers are used to drive high-resolution panels, then the productivity and resolution capability are improved, but the reliability decreases due to increased susceptibility to power supply voltage fluctuations
Solution Approach 1:
The first and second liquid crystal display drivers are electrically connected in parallel to the same power supply voltage line, allowing them to share the power supply load and operate cooperatively. This merging approach distributes the power consumption across multiple chips, reducing the burden on each individual driver and improving overall system reliability. The drivers work together to drive the high-resolution panel while maintaining stable operation.
Solution Approach 2:
The system includes a detection section that monitors the power supply voltage and a shifting section that responds to voltage drops by switching from normal operation to abnormal sequence operation. When voltage fluctuation is detected, the drivers coordinate their operation to prevent pixel burn-in and ensure stable display output, demonstrating feedback-based adaptive control for reliability enhancement.
3Manufacturing precision
If liquid crystal display drivers operate in parallel to achieve high resolution, then the manufacturing precision is improved, but the harmful factors increase due to potential voltage fluctuations causing chip failures and pixel burn-in
Solution Approach 1:
The detection section continuously monitors power supply voltage before harmful effects can occur. When voltage fluctuation is detected, the shifting section proactively switches the drivers to abnormal sequence operation, preventing pixel burn-in and chip failures before they can happen. This preliminary protective action eliminates the harmful effects of voltage fluctuations on the high-resolution display system.
Solution Approach 2:
The system prepares abnormal sequence operation modes in advance that can be activated when voltage fluctuations occur. These pre-prepared protective modes cushion the system against damage by providing alternative operation sequences that prevent harmful effects while maintaining display functionality. The first and second drivers both have these protective capabilities ready to deploy.
Data Source
AI summary
According to one embodiment, a power reception section connects to the battery side, and receives supply of power, a detection section detects a singular state where a voltage of the battery side has fallen to a value less than or equal to a predetermined voltage value, a shifting section receives a detection output of the singular state from the detection section to thereby shift to singular control, and a driver connection section connects the plurality of drivers to each other. If the detection section in one of the liquid crystal display drivers has detected the singular state, the shifting section executes the singular control, and the driver connection section notifies the other liquid crystal display drivers that the singular state has been detected.