Display Voltage Calibration for Flicker Noise Reduction
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Solution Overview
Problem
Conventional TVs face difficulties in preventing flicker noise caused by changes in display voltage due to heating, which requires cumbersome and costly separate repairs.
Innovation Solution
A display device with a power supply circuit and controller that calibrates the display voltage based on the temperature of the device, minimizing flicker phenomena by obtaining a calibrated voltage value and storing it along with the final temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the display device operates for extended periods, then heating occurs causing voltage changes, but this results in flicker noise and luminance differences between frames
Solution Approach 1:
The controller performs preliminary calibration of the display voltage before actual display operation begins. When the display device is turned on, the controller first obtains a calibrated voltage value based on the current temperature and stores it, ensuring that the display voltage is already optimized before content is displayed, thereby preventing flicker noise from occurring during normal operation
Solution Approach 2:
The controller continuously monitors the temperature of the display device and uses this feedback to dynamically adjust the display voltage. When temperature changes are detected, the controller retrieves previously stored calibrated voltage values corresponding to the new temperature condition and applies them, creating a closed-loop system that prevents flicker noise through real-time adaptation
2Reliability
If separate repairs are performed for flicker noise, then the flicker problem is addressed, but the process becomes cumbersome and costly
Solution Approach 1:
The display device performs self-calibration of its display voltage through automated temperature monitoring and voltage adjustment. The controller automatically detects temperature changes, retrieves appropriate calibrated voltage values from storage, and applies them without requiring user intervention or external repair services, making the system self-maintaining and eliminating the need for cumbersome separate repairs
Solution Approach 2:
The system dynamically changes the display voltage parameter based on temperature conditions rather than maintaining a fixed voltage. By storing multiple calibrated voltage values corresponding to different temperature ranges and automatically selecting the appropriate voltage based on current temperature, the system adapts to environmental changes and prevents flicker noise without requiring physical repairs
3Object-affected harmful factors
If voltage calibration is performed continuously, then flicker noise is minimized, but this increases power consumption and processing overhead
Solution Approach 1:
Instead of continuous calibration, the controller performs voltage calibration periodically based on temperature changes. The system monitors temperature and only retrieves and applies calibrated voltage values when temperature thresholds are crossed or significant temperature changes are detected, rather than continuously adjusting voltage during normal operation, thereby reducing power consumption while still preventing flicker noise
Solution Approach 2:
The controller performs voltage calibration in advance when temperature changes are detected, storing the calibrated voltage value for immediate use. This preliminary action ensures that the correct voltage is ready before display operation resumes or continues, eliminating the need for continuous real-time calibration during normal operation and reducing overall power consumption
Data Source
AI summary
Disclosed is a display device including a display, a power supply circuit configured to supply a display voltage to the display, and a controller configured to obtain a calibrated voltage value for correcting the display voltage based on a temperature of the display device and output a voltage to the display based on the temperature of the display device and the calibrated voltage value.