Output Voltage Control for Display Apparatuses
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display apparatuses face challenges in maintaining stable output voltage levels due to input voltage fluctuations, which can lead to instability and potential damage to gate driving, data driving, and timing controlling parts, necessitating a method to effectively control output voltage based on input voltage comparisons and elapsed times.
Innovation Solution
A method and apparatus that compare input voltage with reference and limit voltages, activating or deactivating output voltage based on these comparisons and elapsed times, using a system with comparing parts and an output voltage generating part to manage power voltages for gate, data, and timing controlling parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supplying part deactivates power voltages when input voltage is low to protect driving parts, then reliability is improved, but productivity deteriorates due to unnecessary shutdowns during temporary voltage fluctuations
Solution Approach 1:
The control part stores reference time values in advance for different input voltage ranges. When voltage fluctuation is detected, the appropriate reference time is immediately retrieved and applied without calculation delay, enabling rapid response that prevents unnecessary shutdowns while maintaining protection
Solution Approach 2:
The reference time parameter is dynamically adjusted based on the input voltage range. Different voltage ranges have different reference time thresholds, allowing the system to be more tolerant during minor fluctuations and more protective during severe fluctuations, thus maintaining both productivity and reliability
2Device complexity
If the system uses simple voltage comparison for control, then device complexity is reduced, but measurement precision deteriorates in detecting voltage stability
Solution Approach 1:
The input voltage range is segmented into multiple intervals with different reference time values. By dividing the voltage control space into segments, the system achieves precise detection of voltage stability conditions while maintaining a relatively simple control structure based on standard comparator circuits
Data Source
AI summary
A method of controlling an output voltage of an apparatus is provided. The method includes comparing an input voltage of the apparatus with a reference voltage, activating the output voltage when the input voltage is greater than or equal to the reference voltage, comparing the input voltage with a first low limit voltage or a first high limit voltage, comparing a first elapse time with a reference time when the input voltage is less than or equal to the first low limit voltage, comparing a second elapse time with the reference time when the input voltage is greater than or equal to the first high limit voltage, and deactivating the output voltage when the first elapse time or the second elapse time is longer than or equal to the reference time.