Display Driving IC Segmentation for Power and Cost Reduction
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Solution Overview
Problem
The increasing size of mobile terminal screens and high-resolution channels require efficient chip solutions for driving display panels, but existing technologies face challenges such as increased current consumption and electromagnetic interference due to high-speed interfaces, and the need for ultra-fine processing which raises manufacturing costs.
Innovation Solution
A chip solution device comprising separate display driving integrated circuits (ICs) and display control ICs, where the display driving IC is manufactured using a fine process and the display control IC using an ultra-fine process, with a non-volatile memory for storing driving parameters, and communication through Mobile Industry Processor Interface (MIPI) and Serial Peripheral Interface (SPI) methods, allowing for efficient image processing and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-speed interfaces are used to transmit image data at high resolution, then image quality and resolution are improved, but current consumption and electromagnetic interference increase
Solution Approach 1:
The system is divided into two separate ICs: a display control IC that performs image processing and a display driving IC that drives the panel. This segmentation allows the control IC to use ultra-fine process for high-resolution processing while the driving IC handles high-speed transmission, thereby reducing overall current consumption and electromagnetic interference while maintaining high image resolution.
2Manufacturing precision
If ultra-fine process is used for manufacturing display control IC, then image processing capability is improved, but manufacturing cost increases
Solution Approach 1:
The system separates image processing functions (requiring ultra-fine process for high resolution) from display driving functions (requiring fine process for high speed). The display control IC uses ultra-fine process for superior image processing, while the display driving IC uses fine process for cost-effective high-speed transmission, thereby reducing overall manufacturing costs while maintaining high image processing capability.
3Adaptability or versatility
If separate display driving IC and display control IC are used, then system flexibility and image processing capability are improved, but device complexity increases
Solution Approach 1:
While the system uses separate display control IC and display driving IC for flexibility, it merges their communication through standardized high-speed interfaces and integrates them on a single substrate. This merging approach maintains system flexibility and image processing capability while reducing the perceived complexity through unified integration and standardized protocols.
Data Source
AI summary
A device for driving a display panel includes a display driving integrated circuit (IC) configured to transmit image data to the display panel, a display control IC configured to receive compressed image data from a host and including a timing controller configured to control the display driving IC, and a non-volatile memory configured to transmit data to and receive data from the display control IC, and configured to store driving parameters necessary for operation of the display driving IC.