Display System Partial Scan Power Reduction
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Solution Overview
Problem
As electronic devices with improved display performance and higher resolution increase the amount of transmission data, existing technologies face challenges in minimizing image quality degradation while reducing power consumption, particularly at low driving frequencies.
Innovation Solution
A display system that divides and transmits image data during transmission periods and suspends transmission during suspend periods, using a host processor to rearrange image data based on driving frequency, and a display driving circuit that controls pixel row selection and power supply to optimize scan and data signal delivery, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image data is transmitted continuously at high frequency to maintain image quality, then image quality is preserved, but power consumption increases
Solution Approach 1:
The patent implements periodic transmission of image data by dividing one frame into multiple transmission periods separated by suspend periods. During transmission periods, image data is sent to the display panel, and during suspend periods, transmission is suspended to reduce power consumption. This periodic action allows the system to maintain image quality when needed while reducing energy consumption during intervals when full transmission is not necessary.
Solution Approach 2:
The patent segments the image data transmission process by dividing one frame into multiple transmission periods and suspend periods. The host processor divides image data into multiple data groups that are transmitted in separate transmission periods, with suspend periods in between. This segmentation allows selective transmission of only necessary data portions, reducing overall power consumption while maintaining essential image quality.
2Use of energy by moving object
If transmission frequency is reduced to lower power consumption, then power consumption decreases, but image quality degradation occurs
Solution Approach 1:
The patent dynamically adjusts the transmission frequency and timing of image data based on the specific characteristics of the image content and display requirements. The system can adaptively determine the number and duration of transmission periods within each frame, allowing optimization between power consumption and image quality in real-time conditions rather than using a fixed transmission rate.
Solution Approach 2:
The patent changes transmission parameters such as the number of transmission periods per frame, the duration of each transmission period, and the timing of data groups. By adjusting these parameters, the system can optimize power consumption while maintaining acceptable image quality. The host processor can modify transmission characteristics based on image characteristics and display requirements.
3Reliability
If all pixel rows are scanned continuously to maintain display completeness, then display completeness is ensured, but power consumption increases
Solution Approach 1:
The patent applies periodic action to pixel row scanning by implementing alternating active and inactive periods. During transmission periods, scan signals are supplied to pixel rows for data writing, and during suspend periods, scanning is suspended or reduced. This periodic scanning maintains display completeness over time while reducing power consumption during intervals when all rows do not need active refreshing.
Solution Approach 2:
The patent implements partial scanning where not all pixel rows are scanned with equal frequency or intensity at all times. The system can selectively scan different pixel rows during different transmission periods, or reduce scanning intensity during suspend periods. This partial action approach maintains essential display completeness while consuming less power compared to continuous full-row scanning.
Data Source
AI summary
A display system includes: a host processor which outputs first image data and outputs scan frequency information and a partial scan enable signal, based on an image driving frequency; a display module controlled by the host processor; and an interface. The display module includes: a display driving circuit which controls a selection of pixel rows to which the data signals are supplied based on the scan frequency information and the partial scan enable signal; and a display panel which displays an image on selected pixel rows based on the data signals. In a video mode of the interface, the host processor divides and outputs the first image data through the interface during transmission periods, based on the image driving frequency, and suspends an output of the first image data through the interface during suspend periods.