Display Device Overdrive Circuit Simplification
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Solution Overview
Problem
Existing liquid crystal display devices require complex overdrive circuit configurations and increased costs due to the need for frame memory to store image data, which is not fully mitigated by reducing memory capacity.
Innovation Solution
A display system that transmits both current and previous frame image data simultaneously to the display device, allowing the overdrive processing unit to generate display data by executing overdrive processing based on received data, thereby simplifying the circuit configuration and reducing costs. This system includes a transmission device that allocates bits differently for regions with low and high grayscale characteristics and uses separate transmission interfaces and lines for efficient data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frame memory is installed to store image data for overdrive processing, then overdrive processing can be performed, but the configuration becomes complicated and cost increases
Solution Approach 1:
The patent extracts the frame memory function from the display device itself and relocates it to the external transmission device. The transmission device captures and stores previous frame image data, then transmits it to the display device along with the current frame data. This allows the display device to perform overdrive processing without requiring its own frame memory, thereby simplifying the display device configuration while maintaining overdrive capability.
Solution Approach 2:
The transmission device acts as an intermediary between the image source and the display device. It receives image data, stores previous frame data, and transmits both previous and current frame data to the display device. This intermediary role enables the display device to perform overdrive processing using externally provided historical data without requiring internal frame memory.
2Quantity of substance
If frame memory capacity is reduced to store only specific color or region data, then memory cost decreases, but frame memory is still necessary
Solution Approach 1:
The patent completely removes the frame memory component from the display device by relocating the storage function to the external transmission device. Instead of reducing frame memory capacity, the solution eliminates the need for frame memory in the display device entirely, as the transmission device handles all historical data storage and transmission.
3Device complexity
If both previous frame and current frame data are transmitted simultaneously, then overdrive processing can be performed without frame memory, but transmission bandwidth requirements increase
Solution Approach 1:
The transmission device performs preliminary action by capturing and storing the previous frame image data before it is needed for overdrive processing. This advance preparation allows the display device to receive both previous and current frame data simultaneously without requiring the display device to have its own frame memory, simplifying the overall configuration while managing data transmission requirements.
Data Source
AI summary
Provided is a display system, including: a display device configured to display an image; and a transmission device configured to simultaneously transmit, to the display device, first image data of a first frame and second image data of a second frame that is one frame before the first frame, the display device including: an overdrive processing unit configured to receive the first image data and the second image data transmitted from the transmission device, and to execute overdrive processing on the first image data based on the received first image data and the received second image data, to thereby generate display data; and a display panel configured to display an image based on the display data generated by the overdrive processing unit.