Display Driver Upscaling Using Blank Sync Intervals
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Solution Overview
Problem
Existing display driving devices face challenges in implementing an upscaling function without increasing data transmission and power consumption, often requiring internal memory that leads to larger size and higher manufacturing costs.
Innovation Solution
A display driving device that generates a high-resolution result image by using synchronization signals with both active and blank synchronization signals, allowing the processor to transmit image data and synchronization signals without an internal memory, thereby reducing data transmission and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the upscaling function is implemented in the processor, then high-resolution image output is achieved, but the amount of data transmitted and power consumption increase
Solution Approach 1:
The upscaling function is extracted from the processor and relocated to the display driving device. The processor only transmits the original low-resolution image data, while the display driving device performs the upscaling operation locally, thereby reducing the amount of data that needs to be transmitted and processed by the processor, which directly reduces power consumption.
Solution Approach 2:
The patent introduces a temporal dimension by utilizing blank synchronization signal periods to transmit additional image data needed for upscaling. Instead of transmitting all upscaling data simultaneously, the system spreads the data transmission across multiple horizontal periods, including both active and blank synchronization signals, thereby reducing peak data transmission requirements and power consumption.
2Use of energy by moving object
If the upscaling function is implemented in the display driving device, then data transmission and power consumption are reduced, but internal memory such as a buffer is required
Solution Approach 1:
The patent employs dynamic data transmission by utilizing both active and blank synchronization signal periods. The display driving device receives image data dynamically spread across multiple horizontal periods, allowing it to perform upscaling without requiring large static memory buffers. This dynamic approach reduces the memory capacity needed while maintaining the upscaling function.
Solution Approach 2:
The system performs preliminary actions by transmitting portions of the image data during active synchronization signals and preparing additional data during blank synchronization signals. This staged preparation allows the display driving device to accumulate necessary data over time without requiring large simultaneous storage capacity, thereby reducing memory requirements while enabling upscaling.
3Measurement precision
If internal memory is added to the display driving device, then the upscaling function can be implemented, but manufacturing costs and device size increase
Solution Approach 1:
The patent uses a copying strategy where the display driving device receives and processes multiple copies/portions of image data across different time periods (active and blank synchronization signals). By accumulating these distributed data copies over time, the device can perform upscaling without requiring large internal memory, thereby reducing manufacturing costs while achieving high-resolution output.
4Loss of information
If all image data is transmitted during active synchronization signals, then complete image data is available, but data transmission amount and time increase
Solution Approach 1:
The patent implements periodic data transmission by utilizing both active and blank synchronization signal periods. Image data is transmitted periodically across multiple horizontal periods, with some data sent during active signals and additional data sent during blank signals. This periodic transmission approach completes the data transfer faster than using only active periods, thereby reducing total transmission time while ensuring data completeness.
Solution Approach 2:
The system maintains continuous useful action by utilizing both active and blank synchronization signal periods for data transmission. Instead of leaving blank periods idle, the system continues to transmit useful image data during these periods, thereby accelerating the overall data transmission process and reducing the time required to provide complete image data for upscaling.
Data Source
AI summary
An electronic system may include a processor configured to output image data corresponding to an original image having a first resolution and a synchronization signal; and a display driving device configured to generate a result image having a higher than the first resolution, based on the image data and the synchronization signal, the image data including line image data corresponding to horizontal lines of the original image, and the synchronization signal including horizontal synchronization signals output at horizontal periods, the horizontal synchronization signals including active synchronization signals determining output timing of the line image data, and blank synchronization signals unrelated to the line image data, and the processor configured to output at least one of the blank synchronization signals between at least some of the active synchronization signals, based on scaling information determined based on the first resolution and the second resolution.