Multi-Channel Monitor Driver GAMMA Adjustment Circuit
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Solution Overview
Problem
Conventional multi-channel driver circuits for monitors require large layout areas and high costs due to the need for high-bit digital comparators and registers, which complicates the circuit layout and increases costs, especially for monitors with high resolution and multiple data channels.
Innovation Solution
A GAMMA adjustment method that converts an m-bit input signal into an n-bit signal using a GAMMA adjustment unit and PWM driving components, allowing the use of low-bit digital components to reduce the layout area and cost by simulating a GAMMA curve and comparing signals to generate a PWM driver signal for data channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-bit digital comparators and registers are used to ensure signal conversion accuracy, then the signal conversion precision is improved, but the layout area and cost of the driver circuit increase significantly
Solution Approach 1:
The patent inverts the conventional approach by converting the high-bit counting signal into a low-bit signal before comparison, rather than requiring high-bit comparators to handle high-bit signals directly. This inversion allows the use of low-bit digital comparators and registers, significantly reducing the driver circuit layout area while maintaining effective signal conversion through the GAMMA adjustment unit that simulates the GAMMA curve using low-bit components
Solution Approach 2:
The patent changes the bit-depth parameter of the signal processing components. By transforming the high-bit counting signal into a low-bit signal through GAMMA adjustment, the system can use low-bit digital comparators and registers instead of high-bit components, thereby reducing the layout area and cost of the driver circuit while maintaining the necessary signal conversion accuracy
2Measurement precision
If the quantity of data channels is increased to meet high resolution requirements, then the monitor resolution is improved, but the quantity of digital comparators and registers increases, making the circuit layout more complex and costly
Solution Approach 1:
The patent applies the inversion principle to each data channel by converting high-bit counting signals into low-bit signals before comparison. This allows multiple data channels to be handled using low-bit digital comparators and registers, preventing the circuit layout from becoming overly complex even as the number of channels increases to meet high resolution requirements
Solution Approach 2:
The patent segments the signal processing for each data channel independently, with each channel having its own GAMMA adjustment unit and PWM driving component. This segmentation allows the use of low-bit components in each segment, reducing the overall complexity and cost while supporting multiple data channels for high resolution displays
Data Source
AI summary
A GAMMA adjustment method for a multi-channel driver of a monitor and device thereof are provided. The GAMMA adjustment method converts an m-bit input signal of a high bit signal corresponding to an m-bit simulated GAMMA curve into an n-bit signal of a low bit signal. Then the n-bit signal together with an n-bit input signal are input to a driver component. The driver component compares the two low-bit signals to generate a PWM driver signal supplied to a data channel of the monitor. Since the two n-bit signals of the driver component are of low quantity bit, the driver chooses n-bit digital driver components to greatly reduce an overall layout area of the driver and further to reduce manufacture cost.