HDMI Source Device Power Reduction via Sink Storage Buffer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In image display systems using HDMI cables, the source device must continuously transmit image data to the sink device for display, leading to increased power consumption in the source device.
Innovation Solution
The image display system includes a source device that transmits image data via an HDMI cable to a sink device, which stores and displays the data. The source device stops transmitting data once the sink device begins displaying the stored images, reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the source device continuously transmits image data to the sink device for display, then the display function is maintained, but power consumption in the source device increases
Solution Approach 1:
The sink device stores multiple pieces of image data in advance before display begins. This preliminary storage action allows the source device to stop transmitting after the initial batch, eliminating continuous transmission and reducing power consumption while maintaining display continuity.
Solution Approach 2:
The storage device in the sink device acts as an intermediary buffer between the source device and display output. It receives and holds image data temporarily, allowing the source device to disconnect from continuous transmission while the sink device maintains display operations using stored data.
2Use of energy by moving object
If the source device stops transmitting image data after initial transmission, then power consumption is reduced, but continuous display may be affected
Solution Approach 1:
The sink device pre-stores multiple pieces of image data before display starts. This advance preparation ensures that sufficient data is available in the storage buffer to maintain continuous display operations without requiring ongoing transmission from the power-constrained source device.
Solution Approach 2:
The system changes the transmission parameter from continuous to batch-based. Instead of maintaining constant data flow, the source device transmits in batches and then stops, while the sink device manages display continuity by controlling the playback rate and utilizing the stored data buffer to bridge transmission gaps.
Data Source
AI summary
According to one embodiment, an image display system includes a source device, a sink device, and an HDMI cable that connects the source device and the sink device. The source device includes a transmitter configured to transmit a plurality of pieces of image data via the HDMI cable. The sink device includes a receiver configured to receive the transmitted plurality of pieces of image data, a storage configured to store the received plurality of pieces of image data, and a display controller configured to execute display control processing of repeatedly displaying the plurality of pieces of image data stored in the storage. The transmitter does not transmit image data while the display control processing is being executed.