Vehicle Display Frame Buffer Sharing for CID and RSE Switching
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Solution Overview
Problem
Conventional vehicle display systems, such as central information displays (CID) and rear seat entertainment (RSE), face challenges in memory resource consumption and mirroring issues when executing the same application, making it difficult to satisfy the needs of both drivers and passengers.
Innovation Solution
A method and device configuration that execute the same application on CID and RSE in a single process using a newly defined frame buffer, allowing for efficient data sharing and switching screens based on touch inputs, reducing memory consumption and overcoming mirroring phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the same application is executed individually in separate processes on CID and RSE, then each display can operate independently, but memory resource consumption increases
Solution Approach 1:
The patent merges the execution processes of the same application on CID and RSE into a single process. The first SoC executes the application and generates a frame buffer, which is then transmitted to the second SoC. This combining of execution processes reduces memory resource consumption while maintaining independent operation capability through the frame buffer transmission mechanism.
2Stability of the object's composition
If a touch input on CID or RSE switches both displays to the same screen in mirroring method, then screen consistency is maintained, but it becomes difficult to satisfy the needs of driver and rear seat passenger simultaneously
Solution Approach 1:
The patent implements a dynamic display mode switching mechanism. The system can switch between mirroring mode (for screen consistency) and independent mode (for satisfying different user needs). When a touch input is detected, the system dynamically adjusts the display mode based on the operational context, allowing the CID to maintain navigation information while the RSE can display different content suitable for the rear seat passenger.
Solution Approach 2:
The patent segments the display control into independent controllable units. Each display (CID and RSE) can be controlled independently to show different content when needed, while still maintaining the option for mirroring when consistency is required. This segmentation allows simultaneous satisfaction of different user needs without forcing complete mirroring.
3Reliability
If multiple frame buffers are created for each display executing the same application, then each display has dedicated resources, but memory efficiency decreases
Solution Approach 1:
The patent uses frame buffer copying instead of creating multiple independent frame buffers. The first SoC creates a single frame buffer for the application and copies it to the second SoC. This copying mechanism provides dedicated display resources for each display while maintaining memory efficiency, as the same video data is shared through the copied frame buffer rather than maintaining separate full applications in memory.
Data Source
AI summary
Proposed are a device provided in a vehicle and a method for controlling same. A device provided in a vehicle according to one embodiment of the present disclosure comprises: a first module which executes a first application and outputs first video data corresponding to the first application; and a second module which is wired or wirelessly connected to the first module and outputs video data, which is the same as the first video data, at a first timing. The second module is designed to output second video data which is different from the first video data in response to, for example, an event which has occurred at a second timing after the first timing.