Vehicle Display Unit Compressed Data Transfer Startup Delay

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Solution Overview

Problem

Existing vehicle display systems experience a significant time delay before displaying information due to the large data capacity of image data elements, which prolongs the interval before the display panel shows any images when starting operation.

Innovation Solution

A display unit with a memory for storing compressed image data, an image memory for decompressing and storing this data, and a controller for direct memory access and decompression, allowing for rapid transfer and display of multiple information images, including vehicle speed and engine revolution data, thereby reducing the time interval before the display is operational.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If image data elements are transferred from ROM to image memory, then multiple information images can be displayed on the panel, but the time interval from startup to display becomes long due to large data capacity

Engineering Contradiction:

Improvedisplay capabilityVSAvoidstartup time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent extracts only the essential display information from complete image data elements, transferring and displaying critical information first while the remaining data continues to load in the background. This separates the display function from the complete data transfer process, enabling early display of important information without waiting for all data to arrive.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system performs preliminary processing of image data elements during normal operation, pre-processing data so that when startup occurs, the already-processed information can be displayed immediately. This preliminary preparation eliminates the need to process all data from scratch during startup.

Inventive Principle:

Principle #10Preliminary action

2Quantity of substance

If data capacity of each image data element is large, then comprehensive information can be stored, but transfer and memorization time increases significantly

Engineering Contradiction:

Improvedata capacityVSAvoidtransfer speed

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The patent segments image data elements into multiple parts or priority levels, allowing the system to transfer and display critical segments first while non-critical segments follow. This division enables parallel processing and reduces the apparent transfer time for essential information.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system skips non-essential processing steps during startup by using pre-processed data that was prepared during normal operation. Critical information is displayed by skipping the complete data transfer and processing sequence, rushing through only the essential display path.

Inventive Principle:

Principle #21Skipping (Rushing through)

Data Source

PatentUS7821387B2Display unit and method for displaying image

Publication Date: 2010.10.26 DENSO CORP

AI summary

A display unit includes: a display panel for displaying an information image; a memory for storing a compressed image data element corresponding to the information image; an image memory for storing the compressed image data element transferred from the memory; and a controller for decompressing the compressed image data element stored in the image memory and for controlling the display panel to display the information image based on a decompressed image data element.