Display Apparatus Voltage-Luminance Consistency Check
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Solution Overview
Problem
Existing display apparatuses face issues with inconsistent operation modes due to voltage fluctuations, leading to abnormal power consumption and potential heat generation problems, as the control circuits may incorrectly select modes based on input voltage, causing excessive current draw.
Innovation Solution
A safety protection apparatus that includes an input voltage detection unit, a dimming signal generation unit, and a first check unit to monitor and correct the correspondence between input voltage and luminance information, ensuring the display operates within safe power consumption limits by detecting abnormalities and adjusting the operation mode accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control circuit adopts operation modes based on input voltage detection, then the luminance of the discharge lamp or drive current to LED can be maintained within appropriate ranges, but abnormalities may occur where the operation mode is inconsistent with the input voltage, causing excessively high voltage or current
Solution Approach 1:
The patent implements a feedback mechanism by introducing a check unit that continuously monitors the correspondence between input voltage and operation mode. When an inconsistency is detected (e.g., low voltage mode selected during high input voltage), the system generates an abnormality signal to correct the operation mode, ensuring reliable and safe operation.
2Stability of the object's composition
If the control circuit adjusts rectified output voltage according to input voltage fluctuations, then luminance stability is improved, but the complexity of the control system increases due to additional detection and control circuits
Solution Approach 1:
The patent applies preliminary action by pre-establishing the correspondence relationship between input voltage ranges and operation modes in the control circuit. This allows the system to automatically select appropriate modes based on detected voltage levels without requiring complex real-time calculations, thereby maintaining luminance stability while minimizing control circuit complexity.
3Device complexity
If the system operates without abnormality detection, then the device complexity is reduced, but the safety and reliability of operation under voltage fluctuations deteriorates
Solution Approach 1:
The patent introduces an intermediary check unit that acts as a mediator between the input voltage detection unit and the control circuit. This check unit verifies whether the selected operation mode corresponds to the detected input voltage and generates abnormality signals when inconsistencies are found, enhancing safety without significantly increasing overall system complexity.
Data Source
AI summary
A safety protection apparatus of a display apparatus includes an input voltage detection unit configured to generate input voltage information representing an input voltage, a luminance information generation unit (a dimming signal generation unit) configured to generate luminance information according to the input voltage, and a first check unit configured to check whether there is an abnormality in a correspondence relationship between the input voltage information and the luminance information.