Overdrive Logic Block Embedded Frame Memory LCD Response Time
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Solution Overview
Problem
LCD display devices have slow response times when switching between grey levels, leading to motion artifacts, and existing overdrive techniques require large frame-memories and high power consumption.
Innovation Solution
A display driver with an embedded frame memory and overdrive logic block that calculates overdrive display data using previous frame data and correction factors, allowing for improved motion portrayal with reduced power consumption by integrating overdrive logic within the driver without additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If overdrive technique is implemented using prior art methods, then pixel response time is improved, but power consumption increases and hardware complexity increases
Solution Approach 1:
The patent merges the overdrive logic block with the existing display driver circuitry, integrating the frame memory utilization and overdrive calculation functions into the driver itself. This eliminates the need for separate hardware components and reduces overall power consumption while maintaining the pixel response time improvement benefits of overdrive technology.
Solution Approach 2:
The display driver is designed to perform multiple functions: it serves as both the standard display data interface and the overdrive processing unit. The frame memory is utilized for dual purposes - storing display data and providing previous frame information for overdrive calculations. This multi-functionality reduces the need for additional dedicated hardware and lowers power consumption.
2Speed
If overdrive technique is implemented using prior art methods, then pixel response time is improved, but device complexity increases
Solution Approach 1:
The overdrive logic block is integrated within the display driver, merging multiple functions (frame memory control, overdrive calculation, display data output) into a single unified component. This reduces the number of separate hardware blocks and simplifies the overall device architecture while maintaining overdrive functionality.
Solution Approach 2:
The display driver is designed as a multi-functional unit that handles both standard display data transmission and overdrive processing. The frame memory serves dual purposes for storing display data and providing previous frame information for overdrive calculations, reducing the need for additional dedicated hardware components.
3Measurement precision
If frame memory is used to store previous frame data for overdrive, then overdrive calculation accuracy is improved, but power consumption increases
Solution Approach 1:
The display driver utilizes its own embedded frame memory to store and retrieve previous frame data for overdrive calculations, making the system self-sufficient. This eliminates the need for external memory components and reduces overall power consumption while maintaining the accuracy benefits of having previous frame data available for overdrive processing.
Data Source
AI summary
The invention relates to a display driver comprising an embedded frame memory and an overdrive logic block for moderating display data of a current frame received by the display driver by means of overdrive. The overdrive logic block is arranged for reading data from and writing data to the embedded frame memory and for using display data of a previous image stored in the embedded frame memory for calculating overdrive display data of the current frame. The overdrive display data is used for refreshing the image depicted on a display device. The invention further relates to an LCD display device comprising such a display device.