Display SoC Core Voltage Control Using Temperature Feedback
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Solution Overview
Problem
Conventional display devices control power based on semiconductor characteristics, leading to variations in load and power consumption, resulting in issues like thermal shutdown, DC/DC OCP failure, image breakage, and reliability problems.
Innovation Solution
A display device that monitors temperature to automatically control core voltage by using a temperature sensor and a power supply unit, generating a GPIO control command to adjust the core voltage value based on temperature readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power control is based on semiconductor characteristics (SIDD value), then power consumption can be controlled according to manufacturer specifications, but variations in load and power consumption occur due to semiconductor element characteristics and SoC tolerance
Solution Approach 1:
The patent implements a feedback mechanism where the temperature sensor continuously monitors the SoC temperature and feeds this information back to the processor. The processor then adjusts the core voltage dynamically based on the actual temperature readings, creating a closed-loop control system that adapts to real-time conditions rather than relying on predetermined SIDD values.
Solution Approach 2:
The system enables self-service by allowing the SoC to monitor its own temperature through the integrated temperature sensor and automatically adjust its own core voltage through GPIO control commands to the power supply unit. This self-regulation eliminates the need for external intervention and ensures the system adapts to its own actual operating conditions.
2Device complexity
If core voltage is controlled based on fixed SIDD values, then power control is simplified, but thermal shutdown and DC/DC OCP failures occur due to temperature deviations
Solution Approach 1:
The temperature sensor provides continuous feedback on actual SoC temperature, enabling the system to detect and respond to thermal conditions in real-time. This feedback loop prevents thermal shutdown by adjusting core voltage before critical temperature thresholds are reached.
Solution Approach 2:
The system takes preliminary action by proactively adjusting core voltage based on temperature trends before thermal shutdown or DC/DC OCP failures can occur. The temperature-based control mechanism anticipates potential thermal issues and mitigates them in advance.
3Ease of manufacture
If power control uses manufacturer-provided SIDD values, then initial setup is straightforward, but image breakage and power infinite auto rebooting occur under heavy load conditions
Solution Approach 1:
The patent transitions from static, fixed SIDD-based power control to dynamic temperature-based power control. The core voltage is continuously adjusted based on real-time temperature readings, allowing the system to adapt to varying load conditions and prevent operational failures that occur with fixed control parameters.
Solution Approach 2:
The system changes the control parameter from fixed SIDD values to dynamic temperature readings. By using temperature as the primary control parameter and adjusting core voltage accordingly, the system adapts to actual operating conditions and prevents image breakage and rebooting issues under heavy load.
4Reliability
If temperature-based core voltage control is implemented, then thermal issues are prevented, but additional hardware components are required
Solution Approach 1:
The SoC utilizes its own integrated temperature sensor and internal GPIO control capabilities to perform self-regulation of core voltage. This approach minimizes additional hardware requirements by leveraging existing components within the SoC itself, reducing the need for external temperature sensors or control circuits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach maintains consistent temperature and power consumption, minimizing defects and reducing costs by adapting to semiconductor characteristics and load changes.
Implementation Method 1
reading a temperature of the SoC through a temperature sensor installed in a SoC die
Data Source
AI summary
A display device and an operation method thereof are disclosed. The display device according to an embodiment of the present invention comprises: a memory; a processing unit which includes a temperature sensor; and a power supply unit which supplies power to the processing unit, wherein, depending on a temperature value by the temperature sensor, the processing unit transmits a GPIO control command to the power supply unit to control such that a core voltage value corresponding to the GPIO control command is applied through the power supply unit.