Display Interface Low-Power Island for Dormant Panel Data Transfer
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Solution Overview
Problem
The increasing demand for higher data rates and multiple mode display panels in mobile communication devices leads to significant power consumption, particularly in the display subsystems, which consume a substantial portion of the available power and require improved power conservation.
Innovation Solution
Implementing a system with a display controller that switches between high-speed and low-power modes by using separate physical layer circuits powered by different power supplies, allowing data communication to transition to a low-power serial bus when the display is dormant, and idling the high-speed bus and processor during low-power mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the display subsystem operates in high-speed mode to meet increasing data rate demands, then data transmission capability is improved, but power consumption increases significantly
Solution Approach 1:
The display subsystem dynamically switches between high-speed mode and low-power mode based on operational requirements. The system transitions from a static operational state to a dynamic one where the display controller can adjust its operating mode, enabling high data rates when needed and conserving power during dormant periods, thus resolving the contradiction between speed and energy consumption
Solution Approach 2:
The invention changes the operational parameters of the display subsystem by introducing distinct high-speed and low-power modes with different electrical characteristics. By adjusting voltage levels, clock frequencies, and data transmission rates according to the display's operational state, the system achieves both high performance when required and low power consumption during idle periods
2Adaptability or versatility
If multiple mode display panels are implemented to support both high-speed and low-power operations, then operational flexibility is improved, but device complexity increases
Solution Approach 1:
The display subsystem is designed with multi-functionality, where a single display controller can operate in multiple modes (high-speed and low-power). This universal design allows the same hardware to adapt to different operational requirements without requiring separate dedicated circuits for each mode, thereby achieving operational flexibility while controlling complexity
Solution Approach 2:
The system segments the operational requirements into distinct high-speed and low-power modes, each handled by the display controller according to the display's state. This segmentation allows independent optimization of each mode while using a unified controller architecture, balancing versatility and complexity
Data Source
AI summary
A mobile communication device includes a first physical layer circuit powered by a first power supply and configured to communicate first frames of data over a first serial bus to a display controller in a high-speed mode and to refrain from communicating over the first serial bus when the display controller is operated in a low-power mode, a second physical layer circuit powered by a second power supply and configured to communicate second frames of data at a second data rate over a second serial bus to the display controller in the low-power mode, a first processor powered by the first power supply and configured to generate the first frames of data, and a second processor powered by the second power supply and configured to provide the second frames of data to the second physical layer circuit when the display controller is operated in the low-power mode.